Question

Put the following phrase in proper order to describe what occurs at the neuromuscular junction to trigger muscle contraction.

I. Receptor sites on sarcolemma.

II. Nerve impulse

III. Release of Ca⁺² from sarcoplasmic reticulum

IV. The neurotransmitter acetylcholine is released

V. Sarcomere shorten

VI. Synaptic cleft

VII. Spread of impulses over sarcolemma on T-tubules

• A. II, IV, I, VI, VII, III, V
• B. II, IV, VI, I, VII, III, V
• C. I, II, III, IV, V, VI, VII
• D. VII, VI, V, IV, III, II, I

Answer 1

Answer: (B)

II, IV, VI, I, VII, III, V