As an axon enters a muscle, it branches into a number of axon terminals, each of which makes contact with a single muscle fiber. The portion of the sarcolemma in contact with the axon terminals is called the ________.
Motor end plate
At the neuromuscular junction, calcium ions act to _________.
Release synaptic vesicles from the axon terminal
The first thing that occurs when the axon terminal releases ACh is _________.
Diffusion across the synaptic cleft
What type of ion channel opens in response to an action potential arriving at the axon terminal?