Actin
A) does not perform a power stroke during muscle contraction
B) contains a globular head that forms a cross bridge between the thick and thin filaments
C) is not found within A bands
D) is inhibited by Ca₂₊
E) does not attach to the Z lines
Correct Answer:
Verified
Q13: Sarcomeres are arranged end to end as
A)Z
Q14: A function of tropomyosin is
A)to bind Ca₂₊
B)to
Q15: Each I band in a skeletal muscle
Q16: The striated appearance of skeletal muscle is
Q17: Muscle fibers develop tension by
A)contraction of sarcomeres
B)shortening
C)the
Q19: Cross bridges
A)bind to actin during muscle contraction
B)are
Q20: During contraction of a sarcomere,
A)the Z discs
Q21: During contraction of skeletal muscle fibers, the
A)contractile
Q22: During a cross-bridge cycle in skeletal muscle,
A)the
Q23: Binding of _ to myosin permits the
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