A drug designed to stop neurons from recharging would block

A drug designed to stop neurons from recharging would block the step in which ions

A)are actively pumped down their concentration gradient.

B)spontaneously move down their concentration gradient.

C)are actively pumped against their concentration gradient.

D)spontaneously move against their concentration gradient.

I know it is not D or C..

Solution

A drug designed to stop neurons from recharging would block the actively pumped down their concentration gradient. This is because, the ions have to be pump down through an ATP dependent Na+K+-pump to get back into action potential. Thus, the correct option is (A).