During muscle contraction, the
A) contractile proteins contract.
B) contractile proteins shorten
C) A band becomes smaller
D) I band remains unchanged.
E) amount of calcium in the cytosol remains constant
Correct Answer:
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Q29: Which is characteristic of cross bridges?
A) they
Q30: This molecule allows crossbridge detachment:
A) ATP
B) sodium
C)
Q31: Which molecules are involved with regulation of
Q32: The H zone
A) is the area within
Q33: During excitation-contraction coupling,
A) the action potential travels
Q35: During contraction of skeletal muscle fibers, the
A)
Q37: The sarcoplasmic reticulum stores _ when a
Q37: Which is not characteristic of cross bridges?
A)
Q38: Which of the following changes in banding
Q39: According to the sliding-filament mechanism of muscle
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