Question

What is the correct order that a motor nerve impulse travels when triggering a muscle contraction?

• A. Motor nerve $\rightarrow$ synaptic cleft $\rightarrow$ sarcolemma $\rightarrow$ sarcoplasmic reticulum $\rightarrow$ troponin.
• B. Motor nerve $\rightarrow$ synaptic cleft $\rightarrow$ sarcolemma $\rightarrow$ troponin $\rightarrow$ sarcoplasmic reticulum.
• C. Motor nerve $\rightarrow$ sarcoplasmic reticulum $\rightarrow$ synaptic cleft $\rightarrow$ sarcolemma $\rightarrow$ troponin.
• D. Motor nerve $\rightarrow$ sarcolemnna $\rightarrow$ sarcoplasmic reticulum $\rightarrow$ synaptic cleft $\rightarrow$ troponin.

Answer 1

Answer: (A)

The correct order that a motor nerve impulse travels when triggering a muscle contraction is: motor nerve $\rightarrow$ synaptic cleft $\rightarrow$ sarcolemma $\rightarrow$ sarcoplasmic reticulum $\rightarrow$ troponin.