What is the correct order that a motor nerve impulse travels when triggering a muscle contraction?
A)motor nerve-synaptic cleft-sarcolemma-sarcoplasmic reticulum-troponin
B)motor nerve-synaptic cleft-sarcolemma-troponin-sarcoplasmic reticulum
C)motor nerve-sarcoplasmic reticulum-synaptic cleft-sarcolemma-troponin
D)motor nerve-sarcolemma-sarcoplasmic reticulum-synaptic cleft-troponin
E)motor nerve-sarcolemma-synaptic cleft-sarcoplasmic reticulum-troponin

Question

Quizplus · Accepted Answer

The correct order is: motor nerve, synaptic cleft, sarcolemma, sarcoplasmic reticulum, and then troponin. The impulse travels from the nerve to the synaptic cleft, then to the muscle cell membrane (sarcolemma), which triggers the release of calcium from the sarcoplasmic reticulum, and finally, calcium binds to troponin to initiate contraction.

What Is the Correct Order That a Motor Nerve Impulse