Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 11.2, Problem 11CC
Compare gating and ion selectivity of acetylcholine receptor-channels in the motor end plate with that of ion channels along the axon of a somatic motor neuron.
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Chapter 11 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 11.1 - Prob. 1CCCh. 11.1 - The central nervous system consists of the...Ch. 11.1 - Prob. 3CCCh. 11.1 - A nerve that carries both sensory and motor...Ch. 11.1 - Prob. 5CCCh. 11.1 - In what organelle is most intracellular Ca2+...Ch. 11.1 - Prob. 7CCCh. 11.1 - Prob. 8CCCh. 11.1 - Prob. 9CCCh. 11.2 - Prob. 10CC
Ch. 11.2 - Compare gating and ion selectivity of...Ch. 11.2 - Prob. 12CCCh. 11 - Prob. 1RQCh. 11 - Prob. 2RQCh. 11 - Prob. 3RQCh. 11 - Prob. 4RQCh. 11 - Neurons that secrete acetylcholine are described...Ch. 11 - List four things that can happen to autonomic...Ch. 11 - Prob. 7RQCh. 11 - Prob. 8RQCh. 11 - Somatic motor pathways a. are excitatory or...Ch. 11 - Prob. 10RQCh. 11 - Prob. 11RQCh. 11 - Compare and contrast: a. neuroeffector junctions...Ch. 11 - Prob. 13RQCh. 11 - Create a concept map comparing the somatic motor...Ch. 11 - If a target cells receptor is _______ (use items...Ch. 11 - Ganglia contain the cell bodies of (choose all...Ch. 11 - Prob. 17RQCh. 11 - You have discovered a neuron that innervates an...Ch. 11 - Prob. 19RQCh. 11 - Prob. 20RQ
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- Binding of neurotransmitter to the motor end plate leads to depolarization because the neurotransmitter: a) opens ligand-gated sodium channels. b) opens voltage-gated sodium channels. c) opens ligand-gated potassium channels. d) opens voltage-gated potassium channels.arrow_forwardPredict the consequence if presynaptic action potentials in an axonrelease insufficient acetylcholine to depolarize a skeletal muscle fiber tothreshold.arrow_forwardExplain the intracellular mechansim of smooth muscle relaxation of agaonist such as mepyrimine and atropine.arrow_forward
- In your own words, describe the main events occurring between the arrivalof an action potential at a motor neuron end plate and contraction of thecorresponding muscle. Use 250 words or less.arrow_forwardShow the Comparison of Somatic Motor and Autonomic Motor Pathways ?arrow_forwardList the 3 major classes of motor proteins:arrow_forward
- If ligand-gated K+ channels were to open in an unstimulated muscle fiber,how would this affect the resting membrane potential?arrow_forwardWhich role do gamma (γ) motor neurons play in the function of a muscle spindle? Select one: a. They improve the accuracy of the reported sensory information by innervating intrafusal fibers b. They enhance the force of muscle contraction by innervating intrafusal fibers c. They coordinate the contraction of extrafusal and intrafusal fibers d. They improve the accuracy of the reported sensory information by innervating extrafusal fibers e. They enhance the force of muscle contraction by innervating extrafusal fibersarrow_forwardDescribe the activation of the β2 (beta2) adrenergic receptor, and briefly explain how this leads to increased breakdown of glycogen stores in muscle.arrow_forward
- Discharge from muscle spindles could be increased by all the following, except :-a- increased α-motor neuron dischargeb- increased γ-motor neuron dischargec- stretch of the intrafusal muscle fibersd- stretch of the extrafusal muscle fibersarrow_forwardUsing pyramidal motor tract as a template, describe the voluntary control of skeletal muscles being sure to use appropriate course terminology. Start from the very first neuron and end with neural innervation onto muscle fiber.arrow_forwardThe single-fiber twitch experiments shown here were generated by stimulating the muscle cell membranes to threshold with an electrode and measuring the resulting action potential and force. How would the results differ if Ca21 were removed from the extracellular solution just before the electrical stimulus was applied?arrow_forward
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