What are the correct steps of muscle contraction starting with ACh?
A. ACh diffuses across the synaptic cleft
B. The sarcolemma generates an impulse that moves down the T tubules into the sarcoplasmic reticulum
C. ACh binds to receptors in the sarcolemma
D. The sarcomere contraction produces a myofibril contraction
E. Calcium is released causing the sarcomere contraction
A) a - c - b - e - d
B) a - b - c -e - d
C) d - a - b - e - c
D) c - e - d - a - b

Question

Quizplus · Accepted Answer

The correct sequence for muscle contraction starting with acetylcholine (ACh) is: ACh diffuses across the synaptic cleft (A), ACh binds to receptors in the sarcolemma (C), the sarcolemma generates an impulse that moves down the T tubules into the sarcoplasmic reticulum (B), calcium is released causing the sarcomere contraction (E), and finally, the sarcomere contraction produces a myofibril contraction (D).

What Are the Correct Steps of Muscle Contraction Starting with ACh