★ Musculoskeletal System Responses to Exercises Quiz
What is the primary function of the Z-disc in muscle contraction?
A. Anchor myosin to actin filaments
B. Generate ATP for muscle contraction
C. Stabilize the sarcomere structure
D. Separate sarcomeres and define boundaries
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What is the primary function of the transverse tubules in muscle cells?
A. Store and release calcium ions
B. Generate ATP for muscle contraction
C. Anchor myosin to actin filaments
D. Transmit action potentials deep into the muscle fiber
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