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NEETBiologyLocomotion & MovementClass 11

What is the difference between actin and myosin?

Actin is the thin filament; myosin is the thick filament whose heads pull on actin. Their sliding overlap shortens the muscle during contraction.

Actin is the thin filament; myosin is the thick filament whose heads pull on actin. Their sliding overlap shortens the muscle during contraction. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.

Key point

actin vs myosin

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