The Book Refers to the Axon Membrane as a "Gatekeeper

Multiple Choice

The book refers to the axon membrane as a "gatekeeper." This means that the membrane:

A) determines whether an action potential will pass through the axon.
B) controls the balance of positive and negative ions in the interior and the exterior of the axon.
C) operates in an all-or-none fashion: if it opens, neurotransmitters may pass through, and if it does not open, they may not.
D) uses the nodes of Ranvier to allow some ions to move out of the axon and neurotransmitters to move into the axon.