Mastering the Autonomic Nervous System
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Mastering the Autonomic Nervous System

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Questions and Answers

Which of the following receptors are activated by muscarine, a toadstool poison?

  • Beta receptors
  • Nicotinic receptors
  • Muscarinic receptors (correct)
  • Alpha receptors

    • Which of the following receptors are ligand-gated ion channels?

  • Nicotinic receptors (correct)
  • Alpha receptors
  • Beta receptors
  • Muscarinic receptors

    • Which of the following receptors are activated by nicotine?

  • Muscarinic receptors
  • Beta receptors
  • Nicotinic receptors (correct)
  • Alpha receptors

    • Which of the following receptors use a G protein signaling mechanism?

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

    Which 2 receptors are activated by acetylcholine?

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

    Which of the following receptors are linked to a different G protein?

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

    Which of the following receptors are primarily activated by norepinephrine (NE)?

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

    Which of the following receptors are equally activated by epinephrine (Epi) and norepinephrine (NE)?

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

    Which of the following receptors have a greater effect on stimulating the heart?

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

    Which of the following receptors have a greater effect on constricting blood vessels?

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

    Which neurotransmitter is primarily secreted by cholinergic fibers in the autonomic nervous system?

    <p>Acetylcholine (ACh)</p> Signup and view all the answers

    What percentage of all parasympathetic nerve fibers are found in the vagus nerves?

    <p>75%</p> Signup and view all the answers

    Which branch of the autonomic nervous system primarily innervates the airways of the lungs?

    <p>Parasympathetic nervous system</p> Signup and view all the answers

    Which type of nerve fibers secrete norepinephrine (NE) in the autonomic nervous system?

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

    Which cranial nerves of the parasympathetic nervous system have interruptions in their preganglionic fibers?

    <p>III, VII, and IX</p> Signup and view all the answers

    Which neurotransmitter is primarily secreted by most postganglionic fibers in the parasympathetic nervous system?

    <p>Acetylcholine (ACh)</p> Signup and view all the answers

    Which neurotransmitter is primarily secreted by most postganglionic fibers in the sympathetic nervous system?

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

    Which type of nerve fibers are present in both the sympathetic and parasympathetic nervous systems?

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

    Which branch of the autonomic nervous system primarily secretes acetylcholine (ACh)?

    <p>Parasympathetic nervous system</p> Signup and view all the answers

    Which branch of the autonomic nervous system primarily secretes norepinephrine (NE)?

    <p>Sympathetic nervous system</p> Signup and view all the answers

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