The sliding-filament model of muscle contraction is described by the action of ____ pulling ____ inward.
A) muscle fibers; actin filaments
B) myofilaments; sarcomeres
C) sarcomeres; Z lines
D) actin filaments; myosin filaments
E) myosin filaments; actin filaments
Correct Answer:
Verified
Q45: An Olympic marathon runner probably has more
Q46: When a muscle fiber is relaxed, myosin
Q47: The _ pathway produces the most energy.
A)
Q48: Aerobic respiration increases _.
A) the supply of
Q49: Skeletal muscles become more resistant to fatigue
Q51: White muscle fibers contain some but relatively
Q52: Compared to white muscle fibers, red muscle
Q53: Myoglobin supplies _ to fuel muscle activity.
A)
Q54: The contractile unit of a skeletal muscle
Q55: In a muscle contraction, the sarcomere shortens
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