Author Question: The sodium-potassium ion exchange pump A) must reestablish ion concentrations after each action ... (Read 55 times)

fasfsadfdsfa · **on:** Feb 28, 2019

The sodium-potassium ion exchange pump
A) must reestablish ion concentrations after each action potential.
B) transports sodium ions into the cell during depolarization.
C) transports potassium ions out of the cell during repolarization.
D) moves sodium and potassium opposite to the direction of their electrochemical gradients.
E) depends on a hydrogen gradient for energy.

Question 2

Voltage-gated channels are present
A) at the motor end plate.
B) on the surface of dendrites.
C) in the membrane that covers axons.
D) on the soma of neurons.
E) along the perikaryon of neurons.