Question: When muscles contract, a. Sarcomeres increase in length. b. Actin breaks down ATP. c. Myosin slides past actin. d. The H zone disappears. e. Calcium

When muscles contract,
a. Sarcomeres increase in length.
b. Actin breaks down ATP.
c. Myosin slides past actin.
d. The H zone disappears.
e. Calcium is taken up by the sarcoplasmic reticulum.

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