Practice Question for Membrane Dynamics

[mpelter]

Hi Everyone!

Hope you all are having a great semester. Here is a question about membrane dynamics.

Which one of the following statements is false?

a. Lowering extracellular [K+] makes the potassium equilibrium potential more negative.

b. Raising extracellular [K+] would depolarize most neurons.

c. If the chloride equilibrium potential is less negative than the membrane potential, then one would expect that opening Cl- channels would generate an inward current.

d. If nothing else changes, raising extracellular [Na+] would cause the peak of the action potential to occur at a less positive potential.

 

I want everyone to go through each of the possible answers and explain why it is wrong/right. If it’s false, fix the sentence so it is correct. I will post the answer for this on Friday

Have fun!

Megan

[mpelter]

Hi everyone,

I know we are still having issues with Google groups, so I’m going to postpone putting up the answer for this question.  If you want, you all can email me with your responses and I can post them. 

I also will be posting another practice problem on Sunday as well.

Happy Friday!

Megan

mpe...@usc.edu

[mpelter]

Hi everyone,

 

The answer to this question is d. Try going through each one and determine why its wrong/right. This is the best strategy I found for approaching these type of questions. With practice, this will help you on test day to determine what is the right answer, especially when the potential answers get tricky.

 

I will post another practice question tomorrow.

Megan

On Friday, February 1, 2013 4:48:27 PM UTC-8, mpelter wrote:

Hi everyone,

I know we are still having issues with Google groups, so I’m going to postpone putting up the answer for this question.  If you want, you all can email me with your responses and I can post them. 

I also will be posting another practice problem on Sunday as well.

Happy Friday!

Megan

 

On Sunday, January 27, 2013 5:35:51 PM UTC-8, mpelter wrote: