Question: 1 fill in the blank a a is...
1. Fill in the blank:
a) A ___________ ___________ is a membrane potential that spreads passively through a cell. It decreases in amplitude with distance from its origin.
b) The _________ ________ is often at the axon hillock. There are many voltage-gated sodium channels here at the base of the soma, just before the axon. It is where an action potential is initiated.
c) During the _______ phase of an action potential the membrane begins to depolarize and may reach the action potential threshold.