Objective: SWBAT explain how the cell membrane is involved in nerve communication
Agenda:
- Action Potential WebQuest:
- Site 1 - actionpotential.swf from mcb.harvard.edu
- Site 2 - neuron action potential from blackwellpublishing.com
- Site 3 - action potential spreading from www.harveyproject.org
- Using these websites, consider the following questions:
- How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
- Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
- How does the action potential move down the length of the neuron?
- IF YOU HAVE GMAIL: Click on the "Comment" link underneath the post and start your post with your first name and last initial only. Example: George B.
- IF YOU DON'T: Send an email to askmrtran@gmail.com answering the questions.
53 comments:
Tatiana M.R. Johnson
Question 1-
The neuron cell membrane causes changes in the concentration of Na and K ions inside and outside the cell by use of action potential. This includes the use of potassium and sodium channels used to maintain polarity. The neuron cell membrane uses these pumps to determine depolarization and repolarization, which concentrates either more sodium on the inside,depolarization, and when more potassium ions come inside the cell membrane, repolarization.
Question 2-
In the process of resting potential sodium ions remain on the outside of the neuron cell membrane and potassium ions remain on the inside making the inside negative and the outside positive.
Depolarization is when the sodium ions come through the sodium channels and make the inside of the neuron cell membrane more positive. Repolarization is when the sodium ions go through the Na/K pump and restore the neuron cell back to resting potential while making the insode more negative. When going back to resting potential the ions return to their primary position with the potassium ions in the inside anmd the sodium ions on the outside.
Question 3-
Action potential moves down the length of the neuron by repeating the process of depolarization and repolarization and then by returning back to resting potential.
How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
~The Potassium Channel, the sodium channel, and the ion pumps control the changes in concentration of NA and K ions inside and outside the cell. The channels allow the ions to switch sides while the pump makes the ions switch sides.
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
~During Resting Potential, the inside of the cell is negatice and the outside is postive. During depolarization,
How does the action potential move down the length of the neuron?
lilun. Z Period: 1
Resting potential occurs when the ions that remain outside of cell membrane is more positive than the ions inside.
Depolarization is the signal that send to make the inside of cell membrane more positive.
Repolarization is the returning which means the inside of cell membrane is negative.
Returning to resting potential is the returning to the concentration of Na and K of beginning after depolarization and repolarization.
Yong L.
1st period
1. process of depolarization allows the sodium ions to move into the cell, making it postive charge.
the repolarization, allows the potassium to move out of the cell, which will make it negative.
lastly, the ion pumps use AtP energy to the ions back to original stage.
2.
resting potential
depolarization,
repolariztion
resting potential
3. the action potential as the signal move down the neuron, it switches the negatives and the positives on the axon. as it moves down the axon, it returns to the orignal state.
Andrew Y period 1
1.) The neuron cell membrane causes change in the concentration of Sodium and Potassium by the use of the sodium-potassium pump. This pump constantly makes sure that the outside of the membrane is filled with more positive ions.
2.) Resting Potential: The ion concentrations will have more positive ions outside of the membrane while having negative ions inside the membrane.
Depolarization: The ion concentration will become more positive in the inside of the membrane. Therefore, the outside of the membrane will have more negative ions.
Repolarization: The ion concentration will return to the resting potential, which means that the outside of the membrane will have postive ions while the inside will have negative ions.
How does the action potential move down the length of the neuron?
3.)
Shayna R. Period 1
#1 How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
As the signal moves down the neuron cell membrane, the channels pump NA and K ions causing it to polarize. The NA channels pump the Na ions out of the cell and the K channel pumps the K ions into the cell. After all of this happens the ions return to there original state.
# Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
During the resting potention phase
# How does the action potential move down the length of the neuron?
Tam H.
Question 1: The neuron cell membrane causes changes in the concentration of Na and K ions inside and outside. This allows the membrane to pump, so that positive ions stay on the exterior of the cell.
Question 2: At resting potential, the sodium ions are pumped out to the cell exterior, while the potassium is being pumped back into the cell interior. At depolarization, the sodium ions goes back into the cell interior which then becomes positive. At repolarization, the potassium ions are fed back out to the cell exterior. Finally, at the return to resting potential, the sodium is pumped back out to the cell exterior while, the potassium is pumped back into the cell interior.
Question 3: The action potential moves down the length of the neuron by repeating the process of depolarization, repolarization, and the return to resting potential.
Marcia,S
1.The neuron cell membrane causes changes in the concentration of Na and K ions because both ions travel arcoss the channel to the other side.
2. During the resting potential the ion concentration on the outside is postive potassium, and the negative sodium is on the inside. During polarization the potassium channel opens and lets the potassium inside. During repolarization the sodium channel opens to let the sodium on the outside.Returning back to resting potential the potassium/sodium channels opens to place the ions on the right side.
3.Action potential moves down the length of a neuron by an electrial charge that quickly does the depolarization and repolarization process.
Jonathan M. period 3
Question 1
How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
The neuron cell membrane causes changes in the concentration of Na and K ions inside and outside the cell by using sodium and potassium channels through action potential.
Question 2
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
During resting potential sodium ions remain on the outside of the cell membrane while potassium ions remain on the inside. Depolarization happens when the sodium ions come through the sodium channels. Repolarization occurs when sodium ions go through the sodium or potassium pump.Resting potential all of the ions return to original positions.
Question 3
How does the action potential move down the length of the neuron?
The action potential moves down the length of the neuron because of the changing of negatives to positives.
1. the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell is action protential. The depolarization open the Na channel to allow Na to go inside of the cell. And the repolarization, close the Na channel and open the K channel to allow K to go outside.
2. Resting phase- positive contraction on outside, and negative concentration on outside.
depolarization- open the Na channel.
repolariztion- open the K channel. close the Na channel.
return to resting potential- both K and Na close.
3. Moving Na and K during the action protential.
Jamelia D.
Question 1
The cell membrane allows sodium and potassium to move from one side to another with the help of a sodium potassium pump during the resting potential the concentration stays the same on each side.
Question 2
Resting Potential- The concentration of ions stays the same due to the sodium-potassium pump.
Depolarization- the more positive outside of the cell becomes less positive when the concentration of the positive ions outside the cell go inside the cell. Causing a shift in charge and concentration.
Repolarization-the inside of the cell is more concentrated with positive ions and to get back to "normal" the outside ions go out side and the inside ions stay inside.
Return to Resting potential- the pump begins to work again keeping the concentrations the same as originally.
Question 3
It moves along the lenght of the axon changing the charge from positive to negitive inside and outside the cell, respectively. The movement of the K and Na ions happens almost instantaneously to make the electical charge move along down the axon.
1. The cell membrane has specific ion channels and an ion pump. The Na and K channels allow the movement of Na and K inside and outside the cell in one specific direction. This is done with out the use of energy. In order to equalize the concentration the ion pump uses energy in the form of ATP to move the ions in the opposiste direction.
2. In the resting phase the Na is outside the cell membrane and the K is on the inside.
3. The action potential move down the lenght of the neuron in the form of a wave. It rests, depolarizes, repolarizes, and rests onces again in a cycle that foms a continuous wave.
Daniel C.
*1* The Nueron uses ion pumps to make the concetration either postive or negative.
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
*2*The Inside of a cell during depolarization it becomes postive and during repolarization it becomes negative. the ratio between the k to Na is 3sodium to 2potassium. During Depolarization sodium concetration increases out side the cell. and during repolarization it decreases.
*3*Through going from rest to depolarization to repolarization it creates a motion in which the impulse follow to create an action.
Cindy Guir
Question 1:The nueron cell membrane causes changes in the concentration of sodium and potassium ions in and out of the cell by moving the ions across the membrane. The sodium and potassium pumps let postive ions outside the cell so that the exterior od the cell is more positively charged the the inside of the cell.
Question 2:At resting potential the ions The sodium ions go out the cell membrane while the K ions come in. During depolarization all the sodium ions come in to the cell making it the more postively charged side.Then at Repolarization all the K ions are pumped back out of the cell. When they return to resting potential the k ions are pumped back in and the Na ions are pumped back out.
Question 3:The action
Betsy M.C.
1.The neuron cell membrane causes changes in the concentration of the Na and K ions inside and outside the cell by having one side negative and one side positive.
2. The ion concentraiton on each side of the cell membrane during each of the phases, resting potential is negative because it is inside the cell and the outside is postive. the deplorization is when k is in the inside of the cell where it is positve. The repoloarization is the opposite of the depolarization which is when sodium is in the outside of the cell
Jonathan H. Period 3
#1 How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
The action potential is the movement of the ions through the channels. When the action potential is being used then the ions move from outside the cell to the inside of the cell. When the ions move to the inside of the cell both charges of the inside of the cell and the outside changes.
#2 Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
From the resting potential the charges of the cell both outside and inside stay the same. The depolarization stage changes the charges of the cell and outside. The repolarization makes it go back to the resting charge.
# How does the action potential move down the length of the neuron?
The signal goes up and down the axon and when it goes down the charge of the cell and the charge outside the cell changes. After it changes the cell goes back into resting point and the charges goes back to normal
Angela M.-Period 1
1. During this process, channels open in the neuron membrane and the sodium comes inside the neuron and the K+ goes outside. The when the action potential is pver, an ion pump forces the charged ions back to where they were.
2. During resting potential, there is a large concentration of Na+ in the outside of the neuron and a large concentration of K+ in the inside of the neuron. During depolarization, the concentration of Na+ decreases in the outside and increases in the inside of the neuron. During repolarization, the concentration of K+ in the inside decreases and the concentration of K+ out of the cell is larger. During the return to resting potential, the concentration of Na+ is greater in the outside of the neuron and the concentration of K+ in the inside is greater.
3. The action potential is a change in charges in the outside and the inside of the neuron. When the action potential begins in the brain, it goes down the axon and causes a part of the neuron to change in charges in the inside of the neuron, and then returns to resting potential and the same happens along the neuron.
3.) The action potential moves down the length of the neuron by going through the process of depolarization and then repolarization. In the end, the action potential returns to resting potential.
1st period-Tony R.
#3.How does the action potential move down the length of the neuron?
It moves down by the process of depolarization, and it triggers the next area to also depolarize. It continuously takes place, until the signal gets to the bottom, the foot, which is where the signal is being sent to to produce movement.
How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
With the use of potassium and Sodium channels,ion pumps, the nueron cell membrane causes changes in the concentration of NA and K ions outside and iside the cell.
The Cell membrane changes the concentration of Na and K ions by channels and depolarization and repolarization. The channels bring in 2 potassiums during depolarization while the bring out 3 sodium and during repolarization 2 potassium goes in and 3 sodium goes out of cell mambrane.
Mikel B. Period 1.
1)Process of depolarization allow the sodium channel open and let sodium ions in and make the cell positive charge. process of repolarization allow potassoium channel open and allow potassium ion that are inside the cell to go outside of the cell. lastly the ion pump use ATP to move the sodium and potassium ion to the original stage.
2)Resting potential is when the sodium ion is outside the cell and the potassium ion is outside the cell. Depolarization is when the Potassium channel is closed and the sodium ion rush in to the cell through thet sodium channel. Repolarization is that when the sodium channel is closed the and that the potassium ion is moving out of the cell. Return to resting potential is that when the ion pump move the ion to the original stage.
3) the action potential is when the signal sent thought the neuron the charges that switch the charges from negative to positve and then it switch back to it original stage.
The cell membrane changes the concentration of ions inside aqnd outside during depolarization and repolarization. During these processes, three sodium ions leave the cell, and two potassium ions enter.
How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
~The Potassium Channel, the sodium channel, and the ion pumps control the changes in concentration of NA and K ions inside and outside the cell. The channels allow the ions to switch sides while the pump makes the ions switch sides.
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
~During Resting Potential, the inside of the cell is negatice and the outside is postive. During depolarization,3 sodium ions move to the inside of the cell and 2 potassium ions move to the outisde of the cell so that the inside becomes more positive.During repolarization, the cell returns to its resting potetional as the potassium ions flow out of the cell to make the outside more positive.
How does the action potential move down the length of the neuron?
~The action potential moves down the length of the neuron by going through the process of depolarization and repolarization and returning the its resting potential.
During the process of resting potential, Na stays outside of the cell and K stays inside, so that the inside is negative and the outside is positive.
Linda O. period 1
1.How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
The neuron cell membrane causes changes in the concentration of Na and K ions inside and outside the cell by moving them around to other sides using a sodium channel and a potassium channel. The sodium channel allows a certain amount of the Na ions to go through it to the other side and the potassium channel allows a certain amount of the K ions to go to the other side.
The action potential move down the length of neuron in the process of depolarization and repolarization. First, the sodium channel opens allowing Na to go through; then potassium channel opens and allows K to go through it. At the end, the sodium channel and potassium channel close and they return to resting state
Action potential depolarizes and repolarizes, and then goes back to the resting potential.
Question #1
The neuron cell membrane uses potassium channels as well as sodium channels. The process can be classified as action potential. These channels are used to polarize both sodium and potassium to balance out the amount in and out of the cell. The sodium is trying to come inside the cell which is called depolarization. When potassium tries and come out of the cell, this is called repolarization.
Question #2
In this case, the sodium ions are in resting potential. The potassium ions are inside making the inside negative. The potassium channels go through the third pump and restores the neuron. The sodium ions make the ouside positive as they go through the sodium pumps.
Question#3
Action potential moves down the length of the nueuron by depolarization and repolarization. These steps repeat and start all over again going back to resting potential.
Shayna R. Period 1
#1 How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
As the signal moves down the neuron cell membrane, the channels pump NA and K ions causing it to polarize. The NA channels pump the Na ions out of the cell and the K channel pumps the K ions into the cell. After all of this happens the ions return to there original state.
#2 Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
During the:
-resting potential phase, the sodium-potassium pump works to make sure the positive charges stay outside the cell.
-depolarization phase, the inside of the cell becomes positive.
-repolarization phase, the negative ions return to the inside of the cell.
#3 How does the action potential move down the length of the neuron?
The action potential moves by carrying an electrical current down the length of the axon to transmit nerve impulses.
Question 1: For every three sodium ions pushed out of the cell, two potassium are pumped into the cell.
Question 2: There is an ion ratio of 3:2 - sodium vs. potassium. However, to reach that phase, the ATP must pump out three sodium ions for every two potassium ions it pumps inside.
Question 3: The processes of re/depolarization reoccurs constantly as it moves down the line. The re/depolarization process reoccurs in pulses.
Cindy Guir
Question 1:The nueron cell membrane causes changes in the concentration of sodium and potassium ions in and out of the cell by moving the ions across the membrane. The sodium and potassium pumps let postive ions outside the cell so that the exterior od the cell is more positively charged the the inside of the cell.
Question 2:At resting potential the ions The sodium ions go out the cell membrane while the K ions come in. During depolarization all the sodium ions come in to the cell making it the more postively charged side.Then at Repolarization all the K ions are pumped back out of the cell. When they return to resting potential the k ions are pumped back in and the Na ions are pumped back out.
Question 3:The action potential moves down the legnth of the nueron through an electrical charge by repeating the depolarization, repolarization, and resting potential process again.
1. The cell membrane has specific ion channels and an ion pump. The Na and K channels allow the movement of Na and K inside and outside the cell in one specific direction. This is done with out the use of energy. In order to equalize the concentration the ion pump uses energy in the form of ATP to move the ions in the opposiste direction.
2. In the resting phase the Na is outside the cell membrane and the K is on the inside. Outside the cell it is more posistive than in the inside the cell. In deploraiztion is when the sodium chanel opens who let the flow of sodium inside the cell. For every three sodium ions there are two potassium ions. Repolarization is when the potassium chanels opens up and allows the flow of potassium out side the cell. The ion pump then returns the cell environment to the restiong state.
3. The action potential move down the lenght of the neuron in the form of a wave. It rests, depolarizes, repolarizes, and rests onces again in a cycle that foms a continuous wave.
Jason V. Period 3
1.) Action potential is the cuase of change in the sodium and potassium levels. In the neuron cell membrane the pumps inside help the sodium and potassium to travel in and out.
2.) At resting, sodium stays inside the membrane while potassium remains outside. In depolariztion sodium goes in the cell membrane causing charges to turn positive. In depolariztion the sodium ions enter the membrane bringing the charge back to resting potential returning to negative. At the resting potential everthing basically goes bakc to the defult settings that the charges were at.
3.) Action potential continues to move and repeats all the processes that created either a psoitive or negative charge.
Deborah A.
1.The neuron cell membrance causes changes in the concentration of Na and K ions by using using the potassium pump to move the ions inside and outside of the cell.
2.In the resting potential the Na ions are concentrated outside of the cell and the K ions are concentrated inside of the cell. During depolarization the sodium channel opens and the K ions comes in making them positive. During epolarization, the potassium channel opens and potassium goes out of the cell making it a positive charge. Then in the resting potential the sodium potassium pump restores the ions to their original state.
3.The action potential moves down the length of the axon by switching the ions negatives and positives and returning to the resting phase.
How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
The cell membrane changes the concentration of NA and K ions so that when depolarization occurs the elctric charges could change from negative to positive. This happens when the Na pumps pump in NA ions into the cell membrane and K pumps pump out K ions so that the change in chrage can take place.
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
At depolarization NA ions are pumped in to the cell membrane. Repolarizations K ions are pumped out of the cell membrane. At the resting potential for every 3 NA ions there are 2 K ions inside the cell membrane.
How does the action potential move down the length of the neuron?
The action potential moves down the neuron by using the polarization. this changes the charges inside and out side the cell membrane causing us to feel the sensations we feel.
KATRINA D.
How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
The neuron cell membrane changes in the concentration of Na and K ions inside and outside the cell by action potential. Action potential involves depolarization and repolarization which focuses on the positive and negative changes in ions (Na and K) in the nerve cells.
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
During resting potential, the ions are in both the inside and outside of the cell. The sodium ions are outside of the neuron cell membrane and the potassium ions in the inside, which means the inside is negative and the outside is positively charged. During depolarization, both the sodium and potassium ions are are starting to have potential energy. It is when the sodium ions go through the sodium channels and the make the inside of the cell become positive. Repolarization is when the sodium ions go through both the Na and K ion channels/pumps making the inside of the cell negative and the outside of the cell become more positive. After repolarization, it goes back to resting potential where the sodium ions goes back to the outside of the cell and the potassium ions goes back to the inside of the cell.
How does the action potential move down the length of the neuron?
Action potential moves down the length of the neuron by the processes of depolarization, repolarization, and back to resting potential.
Betsy M.C.
1.The neuron cell membrane causes changes in the concentration of the Na and K ions inside and outside the cell by having one side negative and one side positive.
2. The ion concentraiton on each side of the cell membrane during each of the phases, resting potential is negative because it is inside the cell and the outside is postive. the deplorization is when k is in the inside of the cell where it is positve. The repoloarization is the opposite of the depolarization which is when sodium is in the outside of the cell.The it goes to the return to resting position when everything goes back into place.
3.The Action potential moves down the length of the neuron by repeating the process of depolarization and repolarization and then it returns back to resting potential.
The neuron cell membrane changes in the concentration of Na and K ions inside and outside the cell using the process of depolarization.
Depolarization is when sodium rushes in. Repolarization is when the potassium rushes out. The resting period is where the ion pump returns everything back to default.
The action potential opens the sodium channel which allows sodium to enter the neuron cells and alter negative charges to positive charges.
Question #1:
The neuron cell membrane cause changes in the concentration of Na and K by the use of the ion pump. This pump makes sure that the exterior of the cell membrane is filled with more positive ions than negative.
Question #2:
During resting potential the ion concentration will have more positive ions outside of the cell membrane, having negative ions inside of the cell membrane.
During depolarization the ion concentration will become more positive inside the cell membrane, leaving the outside with more negative ions.
During repolarization the ion concentration will return to resting potential.
Question #3:
The action potential moves down the length of the neuron by going through the process of depolarization and repolarization again, then returning back to resting potential.
Joanne B.
Question 1.
The neuron causes change in the concentration of Na and K ions because thses elments are moving inside and outside of the cell. The process if deplorization and replorization allows Na and K ions to move about.
Question 2.
In the resting potential phase, more ions remain oitside the call then inside of the cell. The outside of the neuron is positive. Na ions are concentrated inside the cell and K ions are concentrated inside of the cell.
in the deplorization phase, when sodium channel is closed Na rushes in and causes the cell interior to become more positive. This deplorizes that region of the membrane.
Replorization is the returning of the cell to the resting potential. The inside of the cell will become more negative. When the sodium channel is closed and the potassium channel is opened, K flows out of the cell and restorees positive charge outside of the cell.
The cell is maintaining the resting potential which membrane proteinis responsiblefor resulting the original concentration of sodium and potassium.
Question 3.
The action potential moves down the length of the neuron through by repeating the process of deplorizatio, replorization, etc.
Question 1-
Through the use of action potential, the neuron cell membrane causes changes in the concentration of Sodium and Potassium inside and outside the cell. The cell membrane uses the pumps for depolarization and repolarization in a repeated process, thus concentrating more sodium on the inside as depolarization and potassium coming into the cell known as repolarization.
Question 2-
During resting potential, sodium ions continue on the outside of the cell membrane and potassium ions stay inside of the cell membrane. Repolarization occurs when potassium enters the cell. Depolarization is when more sodium is concentrated on the inside.
Question 3-
Action potential moves down the length of the neuron by repeatedly going through the process of depolarization and repolarization and then returning to resting potential.
JESSICA T.
1.
The neuron cell membrane causes changes in the concentration of Na and K ions inside and outside the cell by when the signal that is taken place starts moving down the membrane.The Na channel pumps the K ions into the channel. Then it pumps the Na out from the cell. Then the K pumps the K ions back inside the cell. Finally ending all the ions back where they started.
2.
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
What happens to the ion concentrations on each side of the cell membrane during resting potential is all the ions are inside and outside of the cell. During depolarization the cell becomes positive because the sodium goes back into the cell interior. During repolarization the K ions are pumped back out of the cell and the ones already inside of the cell combine. During resting potential the ions return to where the started to the same place.
3.
The action potential move down the length of the neuron by it repeats the same process again by repeating depolariaztion, repolarizations, and then back to resting potential
Question 2
During the phase of resting potential the ion concentrations are equal. When depolarization begins sodium channels open allowing sodium to enter the cell membrane. During Repolarization the potassium channels open to allow postassium to exit the cell membrane. During resting the resting state the potassium and sodiums that traveled in and out of the cell membrane go back to where they were during the resting potential.
Question 3
Action potential moves down the length of the neuron by continuous phases of depolarization and repolarization.
How does the neuron cell membrane cause changes in the concentration of Na and K ions inside and outside the cell?
The Neuron cell membrane causes changes in the concentration of Na and K ions inside and outside the cell with the use of a channel which allows Na and K ions to move down the concentration gradient to oppostite ends of the membrane to gain equilibrium. More importantly a pump uses energy to force Na and K ions back to their original ends in order to keep the concentration gradient and to repeat the process.
Describe what happens to the ion concentrations on each side of the cell membrane during each of these phases: resting potential, depolarization, repolarization, return to resting potential.
During resting potential the inside of the membrane has a higher concentration of K ions making it more negative(less positive)and on the outside there is a higher concentration of Na ions making it more positive.During depolarization more sodium ions flow through the to the inside of the neuron cell membrane while Na ions flow to the outside. During repolarization sodium ions with the help of the pump flow back to the outside of the membrane and Na ions flow back to the inside making in the same as it was during the resting potential stage.
Question 1-
How does the neuron cell membrane cause changes in the concentration of Na an dK ions inside and outside the cell?
The Neuron cell membrane causes change in the concentratoin of Na and K ions with the use of an ion pump. The pump allows the ions to swtich from the inside to the ouitside.
Question 2-
Describe what happens to the ion concentration on each side of the cell membrane during each of these phases: Resting Potential, Depolarization, Repolartization, return to resting potential.
During Resting Potential the ion pump works to make the outside of the cell more positive compared to the inside. Depolarization is the first step to the Action potential. During this process the inside of the cell becomes more positive. During Repolarization is the first step into resting potential. The K and Na Channels work to correct the flow of the ions that will help make the inside of the cell negative. During the resting Potential period the Ion pump works to restore the concentrations inside and outside the cell.
Question 3-
How does the action potential move down the length of the neuron?
The action potential moves down the neuron by repeating the process of depolarization and repolarization wit the help fo the ion pump and the two channels
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