What is the correct order for the steps of synaptic transmission at the motor end plate? 1. Acetylcholine binds to postsynaptic receptors.
2) Acetylcholine is released by exocytosis.
3) A graded depolarization is produced.
4) An action potential is produced on the muscle cell membrane.
5) Channels that primarily allow diffusion of sodium are opened.
6) Voltage -dependent calcium channels on the plasma membrane open.
7) An action potential arrives at the axon terminal.
A) 5, 7, 6, 2, 1, 4, 3
B) 7, 6, 2, 1, 3, 4, 6
C) 6, 7, 2, 1, 3, 5, 4
D) 7, 5, 2, 1, 3, 4, 6
E) 7, 6, 2, 1, 5, 3, 4

Question

Quizplus · Accepted Answer

The correct order starts with an action potential arriving at the axon terminal (7), which triggers the opening of voltage-dependent calcium channels (6). This influx of calcium ions causes acetylcholine to be released by exocytosis (2). Acetylcholine then binds to postsynaptic receptors (1), leading to the opening of channels that primarily allow the diffusion of sodium (5), which produces a graded depolarization (3). This depolarization can then generate an action potential on the muscle cell membrane (4).

What Is the Correct Order for the Steps of Synaptic