Topics: Anatomy - Muscle Histology/NMJ/Physiology Quiz
Which of these occurs first during a muscle contraction?
A. The nerve signal reaches the neuromuscular junction
B. Ach is released and opens Na ion channels
C. The sarcomere shortens
D. The myosin binds to the actin
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Once the action potential reaches the end of the axon terminal what takes place?
A. ACh is released into the synaptic cleft.
B. Calcium is pumped into the sarcolemma.
C. Calcium is pumped into the AT.
D. The muscle contracts.