Figure 45.1

-Which letter on Figure 45.1 corresponds to the action of the sodium-potassium pump and potassium leak channels?
A)A
B)B
C)C
D)D

Question

Figure 45.1
 
-Which letter on Figure 45.1 corresponds to the action of the sodium-potassium pump and potassium leak channels?
A)A 
B)B 
C)C 
D)D

Quizplus · Accepted Answer

The sodium-potassium pump and potassium leak channels are responsible for maintaining the resting membrane potential of neurons. The sodium-potassium pump is an active transport protein that uses ATP to pump three sodium ions out of the cell and two potassium ions into the cell. The potassium leak channels are passive transport proteins that allow potassium ions to leak out of the cell. These two processes work together to maintain a high concentration of potassium ions inside the cell and a low concentration of sodium ions inside the cell. This difference in ion concentrations creates a resting membrane potential of about -70 mV.

Figure 45.1 -Which Letter on Figure 45.1 Corresponds to the Action of to the Action