Autonomic Nervous System: Chapter 15
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Questions and Answers

What is the main role of the hypothalamus?

  • Regulation of autonomic and endocrine function (correct)
  • Regulation of cardiovascular function
  • Control of emotional and memory functions
  • Control of somatic reflexes
  • Which drug has a large effect on the autonomic nervous system, can depolarize all nicotinic receptor synapses without acetylcholine present, and can cause an increase in blood pressure?

  • Caffeine
  • Cocaine
  • Phenylephrine
  • Nicotine (correct)
  • How does a sympathomimetic drug enhance adrenergic function?

  • By reducing norepinephrine production and release
  • By blocking removal of norepinephrine
  • By binding to receptors and increasing norepinephrine production and release (correct)
  • By decreasing blood pressure
  • Which part of the brain is responsible for emotion and memory function, with a strong connection to the hypothalamus?

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

    In the context of drugs affecting the autonomic nervous system, what does 'exogenous chemical' refer to?

    <p>Substance introduced from outside the body</p> Signup and view all the answers

    What effect does a sympatholytic drug have on adrenergic function?

    <p>Interrupts sympathetic activity</p> Signup and view all the answers

    What is the second signaling molecule in the adrenergic synapse?

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

    Which type of receptor does norepinephrine bind to in the adrenergic synapse?

    <p>Muscarinic receptors</p> Signup and view all the answers

    What is the function of norepinephrine in the sympathetic division?

    <p>Activates muscarinic receptors of sweat glands and blood vessels</p> Signup and view all the answers

    Which branch of the autonomic system reacts to stretch stimuli in the aorta and carotid arteries?

    <p>Afferent branch</p> Signup and view all the answers

    What type of reflex has a synapse located in the ganglia and is a completely peripheral, local response?

    <p>Enteric reflex</p> Signup and view all the answers

    Without the parasympathetic signal, what would the heart rate be?

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

    Where do sympathetic signals come from in the thoracolumbar system?

    <p>Thoracic and superior lumbar nerves</p> Signup and view all the answers

    Which division of the ANS is associated with 'fight or flight' response?

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

    Where do postganglionic fibers lead in the parasympathetic division?

    <p>Terminal ganglia on or near the target effector</p> Signup and view all the answers

    Which part of the nervous system receives input from both sympathetic and parasympathetic divisions?

    <p>Organs and systems</p> Signup and view all the answers

    Where does a preganglionic fiber in the parasympathetic division located in the brain go straight to?

    <p>The ganglion through the cranial nerves</p> Signup and view all the answers

    What part of the nervous system has a direct connection to release molecules from preganglionic fibers?

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

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