★ Musculoskeletal System Responses to Exercises Quiz
What is the role of the sarcoplasmic reticulum in muscle cells?
A. Store and release calcium ions
B. Generate ATP for muscle contraction
C. Anchor myosin to actin filaments
D. Regulate muscle flexibility
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Which component is responsible for the transmission of nerve impulses across the neuromuscular junction?
A. Troponin
B. Actin
C. Myosin
D. Tropomyosin
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