Autonomic Nervous System and Gastrointestinal Tract Innervation
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Questions and Answers

Which division of the parasympathetic supply to the gut is called cranio-sacral?

  • Cranial outflow (correct)
  • Oculomotor outflow
  • Sacral outflow
  • Pelvic outflow
  • Which nerve innervates the esophagus, stomach, pancreas, liver, and gallbladder with about 75% of all parasympathetic nerves fibers?

  • Glossopharyngeal nerve (IX)
  • Accessory nerve (XI)
  • Facial nerve (VII)
  • Vagus nerve (X) (correct)
  • Which type of fibers are cholinergic and preganglionic in the parasympathetic nervous system?

  • Parasympathetic fibers (correct)
  • Postganglionic fibers
  • Sensory fibers
  • Sympathetic fibers
  • Which part of the spinal cord gives rise to the sacral outflow of parasympathetic fibers?

    <p>Second, third, and fourth sacral segments</p> Signup and view all the answers

    Which fibers execute the defecation reflexes and pass through the pelvic nerves to the distal half of the large intestine and all the way to the anus?

    <p>Sacral outflow fibers</p> Signup and view all the answers

    Which nerve is responsible for innervating the parotid salivary gland?

    <p>Glossopharyngeal nerve (IX)</p> Signup and view all the answers

    Which part of the autonomic nervous system is responsible for executing the defecation reflexes?

    <p>Parasympathetic sacral outflow</p> Signup and view all the answers

    Where do about 75% of all parasympathetic nerves fibers innervate in the gastrointestinal tract?

    <p>Small intestine and proximal half of the colon</p> Signup and view all the answers

    Which part of the central nervous system do parasympathetic fibers leave through to innervate submandibular and sublingual salivary glands?

    <p>Cranial nerves</p> Signup and view all the answers

    Which type of fibers are cholinergic and preganglionic in the parasympathetic nervous system?

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

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