★ Muscles and Movements Quiz
Which of the following statements is true about the sliding filament theory?
A. During contraction the H zone remains the same length
B. A cross-bridge is formed by troponin and tropomysin attaching to one another
C. A nerve impulse causes an action potential to spread across the muscle
D. ATP is released around the filaments, stimulating the muscle to contract
Preview next quiz:
Thick filaments are in a myofibril are
A. ATPase
B. Sarcoplasmic reticulum
C. Actin
D. Myosin
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