★ Muscle Anatomy Quiz
During skeletal muscle contraction, to what do myosin heads bind?
A. the H zone
B. Z discs
C. actin filaments
D. myosin filaments
Preview next quiz:
What is released by axon terminals into the synaptic cleft to stimulate a muscle to contract?
A. sodium ions
B. acetylcholine
C. actin
D. myosin heads
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