Answered: You cut the axon of a single motor…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

2. You cut the axon of a single motor neuron innervating the biceps muscle. Which of the following is true?
a. The biceps muscle will no longer be able to contract
b. Only one muscle fiber in the biceps will be unable to contract
c. All muscle fibers in the biceps innervated by that motor neuron will no longer be able to contract
d. There will be no effect since each muscle fiber is innervated by multiple motor neurons

3. Which of the following will produce the LARGEST force of twitch contraction? Explain your answer.
a. Stimulation of all alpha motor neurons in a muscle
b. Stimulation of all alpha motor neurons plus all gamma motor neurons in a muscle
c. Both stimulations will cause a similar force of twitch contraction

4. A patient, like Ian Waterman, who has lost all muscle proprioceptor neurons. Which reflexes will be absent in
this patient?

5. You have found a new type of sensory neuron that senses ammonia. If this sensory neuron worked like the
sensory neurons we studied in class, how would it transduce ammonia into action potentials? Be specific when
describing the mechanism.

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