The Parasympathetic Nervous System Quiz
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Questions and Answers

Which neurotransmitter is used by postganglionic sympathetic neurons?

  • Dopamine
  • Acetylcholine
  • Serotonin
  • Norepinephrine (correct)
  • Which neurotransmitter is used by preganglionic neurons in both the sympathetic and parasympathetic nervous systems?

  • Norepinephrine
  • Serotonin
  • Dopamine
  • Acetylcholine (correct)
  • Which receptors are found on the target tissues of postganglionic sympathetic neurons?

  • Dopaminergic receptors
  • Muscarinic cholinergic receptors
  • Serotonergic receptors
  • Adrenergic receptors (correct)
  • Which receptors are found on the target tissues of postganglionic parasympathetic neurons?

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

    Which neurotransmitter is primarily used by most visceral afferents?

    <p>Substance P</p> Signup and view all the answers

    Which region of the brain receives afferents related to cranial nerves VII, IX, and X?

    <p>Nucleus solitary tract (NST)</p> Signup and view all the answers

    Which branch of the autonomic nervous system is responsible for energy conservation and anabolic processing?

    <p>Parasympathetic Nervous System</p> Signup and view all the answers

    What is the function of the craniosacral division of the Parasympathetic Nervous System?

    <p>Promotes GI processes required to digest and absorb nutrients</p> Signup and view all the answers

    Where are the preganglionic neurons of the Parasympathetic Nervous System located?

    <p>Brainstem and sacral segments of spinal cord</p> Signup and view all the answers

    Which cranial nerves are involved in the innervation of the head and neck region by the Parasympathetic Nervous System?

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

    What is the function of the dorsal motor nucleus in the Parasympathetic Nervous System?

    <p>Innervate smooth muscle and glands of the entire GI tract</p> Signup and view all the answers

    Where are the cell bodies of the vagus nerve located?

    <p>Brainstem nuclei</p> Signup and view all the answers

    Which part of the body coordinates autonomic reflexes related to the mouth, stomach, intestines, and pancreas after a meal?

    <p>The hypothalamus</p> Signup and view all the answers

    What type of adjustment does the autonomic system make in response to environmental events?

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

    What is the typical local response to visceral pain that only involves the afferent neuron?

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

    Which plexus is known as the 'Little brain of the gut'?

    <p>Myenteric plexus</p> Signup and view all the answers

    What is the role of vagal baroreceptors in the baroreceptor reflex?

    <p>Detect increase in blood pressure</p> Signup and view all the answers

    What is the result of an increase in vagal parasympathetic nervous system (PNS) activity in the baroreceptor reflex?

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

    What may the system respond with to a low-intensity stimulus that may not reach the central nervous system (CNS)?

    <p>All of the above</p> Signup and view all the answers

    How many major organized plexuses are there in the gastrointestinal (GI) tract?

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

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