Question

During the transmission of signals across a neuromuscular junction, which of the following happens last?

Acetylcholine binds to a receptor protein on the motor end plate.
Sodium and potassium ion gates in the motor end plate open.
Synaptic vesicles release acetylcholine molecules.
Synaptic vesicles move toward the axon terminals.
i think it A

Answer 1

Acetylcholine released by the motor neuron at the neuromuscular junction changes the permeability of the cell membrane at the motor end plate. The permeability change allows the influx of positive charge, which triggers an action potential. The action potential spreads across the entire surface of the muscle fiber and into the interior via T tubules. The cytoplasmic concentration of calcium ions (released from the sarcoplasmic reticulum) increases, triggering the start of a contraction. The contraction ends when AChE removes the ACh from the synaptic cleft and motor end plate.

Answer 2

Sooo C

Answer 3

Yes sirs:)

Answer 4

nice one

Answer 5

thank you both i have one more question and im done

Answer 6

Alright