Autonomic Nervous System Chapter 15: Divisions and Functions
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Questions and Answers

Which part of the brain is responsible for regulating autonomic and endocrine function?

  • Hypothalamus (correct)
  • Limbic lobe
  • Medulla
  • Queen Amygdala
  • What is the primary effect of nicotine on the autonomic nervous system?

  • Causes vasodilation
  • Increases sympathetic tone (correct)
  • Increases parasympathetic activity
  • Decreases blood pressure
  • Which drug category enhances adrenergic function by binding to receptors and increasing norepinephrine production and release?

  • Parasympathomimetic drug
  • Sympathomimetic drug (correct)
  • Nicotine
  • Sympatholytic drug
  • What is the role of the medulla in the autonomic nervous system?

    <p>Cardiovascular center</p> Signup and view all the answers

    In which part of the brain is the limbic lobe located?

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

    What is the effect of a sympatholytic drug on the autonomic nervous system?

    <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 receptors does norepinephrine bind to in the adrenergic synapse?

    <p>Alpha and beta adrenergic receptors</p> Signup and view all the answers

    What type of reflex is afferent branch into the spine or brain?

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

    What does the autonomic system use to react to stretch stimuli in the aorta and carotid arteries?

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

    Which nervous system has a short reflex based on distention of the stomach?

    <p>Enteric nervous system</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

    Which division of the autonomic nervous system is responsible for the 'fight or flight' response?

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

    Where do sympathetic signals originate from in the thoracolumbar system?

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

    What type of fibers are postganglionic fibers in the sympathetic division?

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

    Which ganglia are part of the enteric nervous system in the sympathetic division?

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

    What is the function of the intramural ganglia in the parasympathetic division?

    <p>To be on or near the target effector</p> Signup and view all the answers

    What is the characteristic of preganglionic fibers in the parasympathetic division located in the brain?

    <p>Short, myelinated</p> Signup and view all the answers

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