★ Muscle Anatomy Quiz
According to the sliding filament theory, how does muscle contraction occur?
A. Both thick and thin filaments shorten as the muscle contracts.
B. Myosin heads attach and detach from thin filaments, causing thin filaments to shorten.
C. A bands bunch up and shorten as myosin heads attach to thin filaments.
D. Myosin cross bridges pull thin filaments, causing them to slide.
Select your answer:
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