neuromuscular junctions
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7 Terms
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1st step
The influx of calcium ions causes vesicles containing the neurotransmitter acetylcholine to fuse with the membrane of the motor
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2nd step
Calcium ion protein channels in the motor neuron are stimulated to open, and calcium ions enter the motor
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3rd step
The sodium ion channels open, and sodium ions diffuse into the muscle fiber.
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4th step
Acetylcholine diffuses across the synaptic cleft and binds to receptor sites on the membrane of the muscle fiber.
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5th step
The influx of sodium ions depolarizes the membrane of the muscle fiber.
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6th step
An action potential reaches the end of a motor neuron.
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7th step
Muscle contraction occurs
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Flashcards (28)