With regard to skeletal muscle contraction,which event comes first?
A) crossbridge formation between actin and myosin
B) release of calcium from the sarcoplasmic reticulum
C) activation of the NM receptor within the neuromuscular junction
D) release of neurotransmitter (ACh)from the somatic motor neuron

Question

Quizplus · Accepted Answer

ACh is released from the somatic motor neuron,diffuses across the neuromuscular junction and binds to the postjunctional membrane causing an action potential;the action potential ultimately results in muscle contraction.

With Regard to Skeletal Muscle Contraction,which Event Comes First