[Answer] Which of the following occurs first in the generation of an action potential?

Answer: The membrane depolarizes
Which of the following occurs first in the generation of an action potential?

In physiology an action potential (AP) occurs when the membrane potential of a specific cell location rapidly rises and falls: this depolarization then causes adjacent locations to similarly depolarize. Action potentials occur in several types of animal cells called excitable cells which include neurons muscle cells endocrine cells and in some plant cells. In neurons action potentials play a central role in cell-to-cell communicationby providing for—or with re…

For many years it was believed that the axon hillock was the usual site of initiation of action potentials —the trigger zone. It is now thought that the earliest site of action potential initiation is at the initial segment: just between the peak of the axon hillock …

The cardiac action potential is a brief change in voltage across the cell membrane of heart cells. This is caused by the movement of charged atoms between the inside and outside of the cell through proteins called ion channels. The cardiac action potential differs from action potentials found…

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