Multiple Choice
What causes a muscle cell to contract?
A) Actin and myosin break down.
B) Actin heads attached to myosin bend.
C) Calcium ions form a bridge binding actin to myosin.
D) ATP forms a bridge binding actin to myosin.
E) Myosin heads attached to actin bend.
Correct Answer:
Verified
Correct Answer:
Verified
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