In contrast to other cell types,nerve and muscle cells are able to conduct action potentials because they
A) are polarized to respond to membrane voltage.
B) are permeable to potassium at rest.
C) have voltage-gated ion channels.
D) are impermeable to sodium at rest.

Question

Quizplus · Accepted Answer

Voltage-gated ion channels allow the cell membranes of excitable cell types,like nerve and muscle,to open and close in response to fluctuations in membrane voltage.Potassium channels allow for repolarization of cells.The cell membrane is permeable to potassium at rest.Fast sodium channels allow sodium influx during the upstroke of the action potential.

In Contrast to Other Cell Types,nerve and Muscle Cells Are