Physiology - Gastrointestinal Tract Introduction
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Questions and Answers

Which of the following is NOT a major function of the gastrointestinal tract?

  • Excretion of waste (correct)
  • Digestion of food
  • Absorption of nutrients
  • Secretion of digestive enzymes

Which layer of the gastrointestinal tract wall contains the myenteric (Auerbach's) plexus?

  • Longitudinal muscle (correct)
  • Submucous (Meissner's) plexus
  • Circular muscle
  • Serosa

What is the primary function of the submucous (Meissner's) plexus in the gastrointestinal tract?

  • To control secretion
  • To supply blood vessels
  • To provide sensation (correct)
  • To control motility

Which of the following glands is NOT directly connected to the gastrointestinal tract?

<p>Adrenal glands (C)</p> Signup and view all the answers

What is the main function of the myenteric (Auerbach's) plexus in the gastrointestinal tract?

<p>To control motility (B)</p> Signup and view all the answers

Which of the following is NOT a major component of the nervous control of gastrointestinal tract functions?

<p>Endocrine system (D)</p> Signup and view all the answers

Which plexus in the enteric nervous system mainly controls gastrointestinal movement?

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

What is the function of the submucous plexus in the enteric nervous system?

<p>Regulates blood flow (B)</p> Signup and view all the answers

Which type of receptor in the gastrointestinal mucosa is stimulated by the chemical nature of food?

<p>Chemoreceptors (B)</p> Signup and view all the answers

Which neurotransmitter is the usual chemical transmitter in the gastrointestinal enteric nervous system?

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

Which division of the autonomic nervous system innervates the distal part of the large intestine?

<p>Parasympathetic sacral division (D)</p> Signup and view all the answers

What is the effect of stimulating the sympathetic nervous system on gastrointestinal activity?

<p>Inhibits motility and secretion (B)</p> Signup and view all the answers

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