Dental Physiology: Autonomic Nervous System 2
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Questions and Answers

What is the primary effect of sympathetic nervous system on the liver?

  • Decrease metabolic rate
  • Glycogen synthesis
  • Decrease fibrinogen synthesis
  • Glycogenolysis (hyperglycemia) (correct)
  • What is the main effect of noradrenaline released by the sympathetic nervous system on the cardiovascular system?

  • Bradycardia
  • Decrease arterial blood pressure (correct)
  • Increase cardiac contractility
  • Vasodilation
  • Which neurotransmitter is predominantly secreted by the adrenal medulla under sympathetic stimulation?

  • Serotonin
  • Dopamine
  • Adrenaline (correct)
  • Noradrenaline
  • What is the primary effect of the sympathetic nervous system on the liver?

    <p>Induction of hypoglycemia</p> Signup and view all the answers

    How does the sympathetic nervous system affect the gastrointestinal tract?

    <p>Relaxation of wall</p> Signup and view all the answers

    What is the effect of sympathetic stimulation on the male genitalia?

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

    Under sympathetic stimulation, what effect does noradrenaline predominantly have on the cardiovascular system?

    <p>Increase in arterial blood pressure via α1 receptors</p> Signup and view all the answers

    How does the sympathetic nervous system affect the gastrointestinal tract?

    <p>Inhibition of wall relaxation</p> Signup and view all the answers

    Which cranial nerve is responsible for pupil constriction in the eye as part of the parasympathetic nervous system?

    <p>Oculomotor nerve (3rd cranial nerve)</p> Signup and view all the answers

    What is the effect of sympathetic stimulation on the urinary bladder?

    <p>Inhibition of urine retention</p> Signup and view all the answers

    Which neurotransmitter is predominantly secreted by the adrenal medulla under sympathetic stimulation?

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

    Which part of the body is primarily affected by the parasympathetic nervous system originating from the sacral outflow of S2-S4?

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

    Which cranial nerve originates from the inferior salivary nucleus in the medulla and is responsible for increasing secretions in the parotid gland?

    <p>Glossopharyngeal nerve (9th cranial nerve)</p> Signup and view all the answers

    Which cranial nerve originating from the superior salivary nucleus in the pons is responsible for increasing secretions in the sublingual and submandibular glands?

    <p>Facial nerve (7th cranial nerve)</p> Signup and view all the answers

    Which part of the body is primarily affected by the parasympathetic nervous system originating from the cranio-sacral outflow?

    <p>Head and neck</p> Signup and view all the answers

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