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27 28 29 A typical motor unit consists of A. One neuron and all of the skeletal muscle fibers it controls. B. One skeletal muscle fiber and all of the neurons that control it. C. One skeletal muscle fiber and the one neuron that controls it. D. One axon terminal branch and the myofibrils it controls. Which muscle fibers generate more force? A. Fast-twitch fibers B. Slow-twitch fibers Which muscle fibers fatigue sooner? A. Fast-twitch fibers B. Slow-twitch fibers

27 28 29 A typical motor unit consists of A. One neuron and all of the skeletal muscle fibers it controls. B. One skeletal muscle fiber and all of the neurons that control it. C. One skeletal muscle fiber and the one neuron that controls it. D. One axon terminal branch and the myofibrils it controls. Which muscle fibers generate more force? A. Fast-twitch fibers B. Slow-twitch fibers Which muscle fibers fatigue sooner? A. Fast-twitch fibers B. Slow-twitch fibers

Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter43: Muscles, Bones, And Body Movements
Section: Chapter Questions
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27 28 29 30 31 32 A typical motor unit consists of A. One neuron and all of the skeletal muscle fibers it controls. B. One skeletal muscle fiber and all of the neurons that control it. C. One skeletal muscle fiber and the one neuron that controls it. D. One axon terminal branch and the myofibrils it controls. Which muscle fibers generate more force? A. Fast-twitch fibers B. Slow-twitch fibers Which muscle fibers fatigue sooner? A. Fast-twitch fibers B. Slow-twitch fibers The nervous system avoids muscle fatigue during contraction in mixed muscles by A. Only recruiting slow-twitch motor units. B. Recruiting different types of motor units in a specific sequence. C. Only recruiting fast-twitch motor units. D. Recruiting slow-twitch and fast-twitch motor units at the same time. A polysynaptic reflex has at least in the reflex pathway. A. One synapse and two neurons. B. Two synapses and three neurons. The reflex compensates a withdrawal reflex by making adjustments on the opposite side of the body from the stimulus. A. Stretch B. Tendon C. Flexion D. Crossed extensor
Transcribed Image Text:27 28 29 30 31 32 A typical motor unit consists of A. One neuron and all of the skeletal muscle fibers it controls. B. One skeletal muscle fiber and all of the neurons that control it. C. One skeletal muscle fiber and the one neuron that controls it. D. One axon terminal branch and the myofibrils it controls. Which muscle fibers generate more force? A. Fast-twitch fibers B. Slow-twitch fibers Which muscle fibers fatigue sooner? A. Fast-twitch fibers B. Slow-twitch fibers The nervous system avoids muscle fatigue during contraction in mixed muscles by A. Only recruiting slow-twitch motor units. B. Recruiting different types of motor units in a specific sequence. C. Only recruiting fast-twitch motor units. D. Recruiting slow-twitch and fast-twitch motor units at the same time. A polysynaptic reflex has at least in the reflex pathway. A. One synapse and two neurons. B. Two synapses and three neurons. The reflex compensates a withdrawal reflex by making adjustments on the opposite side of the body from the stimulus. A. Stretch B. Tendon C. Flexion D. Crossed extensor
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