When calcium ion binds to troponin,
A) tropomyosin moves into the groove between the helical actin strands.
B) active sites on the myosin are exposed.
C) troponin shifts to expose the active sites on actin.
D) muscle relaxation occurs.
E) myosin shortens.
Correct Answer:
Verified
Q35: Cross-bridges are portions of
A)actin molecules.
B)myosin molecules.
C)troponin molecules.
D)tropomyosin
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A)Calcium
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