Functional Anatomy and Structure of the Gastrointestinal Tract
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Questions and Answers

What initiates the process of peristalsis in the gastrointestinal tract?

  • Inhibition of smooth muscle contractions
  • Activation of enteric interneurons
  • A bolus of chyme stimulating intrinsic afferents (correct)
  • Release of neurotransmitters by motor neurons

    • Which cells surround the pyramidal cells in the acinus of salivary glands?

  • Myoepithelial cells (correct)
  • Cuboidal cells
  • Mucous cells
  • Serous cells

    • What is the primary function of intercalated and striated ducts in salivary glands?

  • Modify ionic composition of the secretion from acinus (correct)
  • Control the pH and tonicity of saliva
  • Dilate blood vessels in response to fluid extraction
  • Secrete digestive enzymes

    • What is the main contribution of myoepithelial cells in salivary gland secretions?

    <p>Dilate blood vessels during fluid extraction</p> Signup and view all the answers

    What is the primary role of acinar cells in salivary gland function?

    <p>Release of digestive enzymes</p> Signup and view all the answers

    What is the most abundant component of saliva in terms of percentage?

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

    What ions are added to the fluid secreted by salivary glands?

    <p>Potassium and Magnesium</p> Signup and view all the answers

    What is the role of lingual lipase in saliva?

    <p>+) enzyme for lipid digestion</p> Signup and view all the answers

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