Home Biology Locomotion and Movement General Muscle contraction is triggered
Biology Locomotion and Movement General Single Correct MCQ
Published on: August 14, 2026

Muscle contraction is triggered

A
when high levels of oxygen and sugar are released by the sarcolemma.
B
when a surplus of ATP is released by a nerve motor unit.
C
by release of a neurotransmitter at a synapse that directly causes actin and myosin to slide.
D
by the nerve releasing a neurotransmitter, which triggers a flow of calcium that attaches to actin filaments and exposes the myosin binding sites.

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