Autonomic Nervous System: Divisions and Control
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Questions and Answers

What is the main function of the sympathetic division of the autonomic nervous system?

  • Initiating the fight or flight response (correct)
  • Supporting the enteric nervous system
  • Controlling cardiac and smooth muscles
  • Promoting rest and digest activities
  • Where do sympathetic signals come from in the thoracolumbar system?

  • Coccygeal and inferior lumbar nerves
  • Thoracic and superior lumbar nerves (correct)
  • Facial and trigeminal nerves
  • Cervical and sacral nerves
  • Where does a preganglionic fiber travel from in the sympathetic division?

  • Spinal cord to sympathetic ganglion (correct)
  • Sympathetic ganglion to target effector
  • Brainstem to target effector
  • Spinal cord to adrenal medulla
  • Which part of the autonomic nervous system receives direct connection from preganglionic fibers to release molecules?

    <p>Adrenal medulla</p> Signup and view all the answers

    What is the function of the parasympathetic division of the autonomic nervous system?

    <p>Promoting rest and digest activities</p> Signup and view all the answers

    How many ganglia are there on each side of the spinal cord in the sympathetic chain ganglia?

    <p>23 ganglia</p> Signup and view all the answers

    What type of fiber is a postganglionic fiber in the sympathetic division?

    <p>Long and unmyelinated</p> Signup and view all the answers

    What does a preganglionic fiber have direct connection with in the sympathetic division?

    <p>Adrenal medulla</p> Signup and view all the answers

    What is the primary role of the divisions of the autonomic nervous system?

    <p>Maintain homeostasis</p> Signup and view all the answers

    Which type of synapse involves the release of norepinephrine to either an alpha receptor or a beta receptor?

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

    What is the role of the enteric nervous system?

    <p>Conducting long reflexes in the digestive organs</p> Signup and view all the answers

    What would be the heart rate without the parasympathetic signal to slow it down?

    <p>100 bpm</p> Signup and view all the answers

    Which part of the brain is responsible for emotion and memory function?

    <p>Limbic lobe</p> Signup and view all the answers

    Which type of drug enhances adrenergic function by binding to receptors and increasing norepinephrine production and release?

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

    What is the main effect of sympatholytic drugs?

    <p>Blocking adrenergic function</p> Signup and view all the answers

    Which central structure receives much input from the hypothalamus and is involved in regulating cardiovascular function?

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

    What does nicotine do in the autonomic nervous system?

    <p>Depolarizes all nicotinic receptor synapses without ACh present</p> Signup and view all the answers

    What is the conscious perception of autonomic sensation called?

    <p>Referred Pain</p> Signup and view all the answers

    What type of synapse involves Ach released to either a nicotinic receptor or a muscarinic receptor?

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

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