Autonomic Nervous System Overview
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Questions and Answers

What is the main reason behind the term 'autonomic' being applied to the autonomic nervous system (ANS)?

  • The extrinsic innervation required for the beating of a heart.
  • The presence of independent rhythms and reflexes in target organs and tissues. (correct)
  • The location of cell bodies within the central nervous system.
  • The regulation of body activities under conscious control.

    • Which physiological process demonstrates the capability of the gut when isolated from the central nervous system?

  • Peristalsis to move chyme along. (correct)
  • Extrinsic innervation to maintain its functions.
  • Sensory feedback to adjust its operations.
  • Voluntary control over digestion.

    • What type of muscles does the autonomic nervous system (ANS) primarily innervate?

  • Cardiac muscle, skeletal muscles, and skin.
  • Smooth muscle, visceral muscles, and blood vessels.
  • Cardiac muscle, smooth muscle, and internal organs. (correct)
  • Skeletal muscles and internal organs.

    • Where do the cell bodies of motor neurons reside in the voluntary somatic nervous system?

    <p>In the central nervous system (CNS).</p> Signup and view all the answers

    What distinguishes the motor pathways of the autonomic nervous system (ANS) from those of the voluntary somatic nervous system?

    <p>Cell body locations of motor neurons.</p> Signup and view all the answers

    What is a fundamental feature of the autonomic nervous system (ANS) with respect to conscious control?

    <p>Regulates body activities generally not under conscious control.</p> Signup and view all the answers

    What is the neurotransmitter at the end organ as well as at the preganglionic synapse in the parasympathetic nervous system?

    <p>Acetylcholine</p> Signup and view all the answers

    Which division of the autonomic nervous system is responsible for 'mobilization & increased metabolism'?

    <p>Sympathetic division</p> Signup and view all the answers

    Where are all the preganglionic neurons of the parasympathetic nervous system located?

    <p>Brain stem or sacral levels of the spinal cord</p> Signup and view all the answers

    Which cranial nerve is responsible for stimulating digestive glands in the parasympathetic nervous system?

    <p>Cranial nerve X (Vagus)</p> Signup and view all the answers

    What is the neurotransmitter released by most postganglionic fibers in the sympathetic nervous system?

    <p>Noradrenaline (Norepinephrine)</p> Signup and view all the answers

    Which part of the body experiences vasoconstriction as a response in the sympathetic nervous system?

    <p>Skeletal muscles</p> Signup and view all the answers

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