Which statement is incorrect about cross bridges?
A) They are globular myosin heads that protrude from the thick filaments.
B) They bend during muscle contraction.
C) They attach and detach from actin during muscle contraction.
D) They are not found in the I band.
E) They bind with troponin during contraction.
Correct Answer:
Verified
Q34: During excitation-contraction coupling,
A)the action potential travels down
Q35: During muscle contraction,
A)the Z lines move farther
Q36: The T tubules
A)store Ca₂₊
B)provide a means of
Q37: The sarcoplasmic reticulum stores _ when a
Q38: Of the steps in excitation-contraction below, which
Q40: Sequence the following events involved in muscle
Q41: Twitch summation
A)is a means by which gradation
Q42: In twitch summation, the muscle fiber
A)is stimulated
Q43: To pick up something heavier than your
Q44: Submaximal isometric contractions are important for
A)moving large
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