BIOLOGY TOPIC 11 ANIMAL PHYSIOLOGY (HL): What is the 2nd stage of muscle contraction? (4)

Question

What is the 2nd stage of muscle contraction? (4)

Sammy Universe · Accepted Answer

Cross Bridge formation
Ca ions bind to regulatory protein troponin which displaces tropomyosin which exposes the binding sites
the actin binding sites form cross bridges with the myosin heads

BIOLOGY TOPIC 11 ANIMAL PHYSIOLOGY (HL)

What is the 2nd stage of muscle contraction? (4)

Cross Bridge formation Ca ions bind to regulatory protein troponin which displaces tropomyosin which exposes the binding sites the actin binding sites form cross bridges with the myosin heads

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