Sequence the following events involved in muscle cell contraction:
1)Sodium channels open and sodium flows in.
2)Impulse reaches the axon's terminal.
3)ACh binds to receptors on the muscle cell membrane.
4)Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis.
5)If enough sodium moves in to the muscle cell, an impulse (action potential) develops.

Question

Quizplus · Accepted Answer

The sequence of events involved in muscle cell contraction is as follows:
1) An impulse (action potential) reaches the axon's terminal (2).
2) Synaptic vesicles fuse with the neuron's membrane, and acetylcholine (ACh) is released via exocytosis (4).
3) ACh binds to receptors on the muscle cell membrane (3).
4) Sodium channels open, and sodium flows into the muscle cell (1).
5) If enough sodium flows into the muscle cell, an impulse (action potential) develops (5).

Therefore, the correct sequence is 2-4-3-1-5, which is represented by option C.

Sequence the Following Events Involved in Muscle Cell Contraction