Question

A neuron's sodium channels are malfunctioning and will no longer open. How would this prevent the cell from changing its polarity, and why?

A.) It could not repolarize because the cell cannot become more positively charged.
B.) It could not repolarize because the cell cannot become more negatively charged.
C.) It could not depolarize because the cell cannot become more positively charged.
D.) It could not depolarize because the cell cannot become more negatively charged.

Answer 1

What do you think? And this is related to the Potassium-Sodium Ion Channel? If so, that's a hint.

Answer 2

I think it has to do with depolarization. am I right?

Answer 3

http://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/1221_Action_Potential.jpg/330px-1221_Action_Potential.jpg

Answer 4

Sodium has a positive charge.

Answer 5

is the answer C?

Answer 6

You always keep asking here, but I think you know the answer, all you need is reaffirmation. Ja?

Answer 7

I know depolarization happens before repolarization. and that a neurons resting potential is: negative charge inside & positive charge outside. so if sodium has to do with the initial reversal of charges, allowing positive to flow in, so if it wasn't working it wouldnt be able to allow positive in(wouldnt allow the cell to become more positive) meaning it couldnt depolarize, right?

Answer 8

Well, in this case, take 'polarization' to mean more negative (which slightly is incorrect but whatever). Sodium is a positive ion. I was hoping that with the diagram, you would take a look at the y-axis.

Answer 9

i didnt understand the graph.

Answer 10

is the answer C?

Answer 11

@NotTim I need reassurance

Answer 12

I would agree.

Answer 13

ok thnx