GIT Part 1: Digestive System Functions
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Questions and Answers

Which of the following is NOT a major digestive process?

  • Propulsion
  • Respiration (correct)
  • Ingestion
  • Defecation
  • Which layer of the GIT wall is responsible for the secretion of mucus, enzymes, and hormones?

  • Submucosa
  • Muscularis externa
  • Mucosa (correct)
  • Serosa
  • Which of the following is an accessory digestive organ?

  • Small intestine
  • Pharynx
  • Stomach
  • Salivary glands (correct)
  • What is the purpose of the digestive processes?

    <p>To make food less complex at each step and make nutrients available to the body</p> Signup and view all the answers

    What is the function of the propulsion process?

    <p>To move food through the alimentary canal</p> Signup and view all the answers

    What is the function of the mechanical digestion process?

    <p>To increase the surface area of ingested food</p> Signup and view all the answers

    What is the main function of the inner circular layer of the muscularis externa?

    <p>To form sphincters and prevent food backflow</p> Signup and view all the answers

    What is the main component of saliva that helps prevent dental caries?

    <p>Bicarbonate buffers</p> Signup and view all the answers

    What is the effect of parasympathetic stimulation on salivary glands?

    <p>It produces abundant flow of watery saliva</p> Signup and view all the answers

    What is the main function of the serosa?

    <p>To provide a protective outermost layer of intraperitoneal organs</p> Signup and view all the answers

    What is the primary function of the enteric nervous system?

    <p>To control GI tract motility</p> Signup and view all the answers

    What is the effect of sympathetic stimulation on salivary glands?

    <p>It elicits a smaller volume of thick saliva</p> Signup and view all the answers

    What is the primary function of the pharynx in the swallowing process?

    <p>To voluntarily control the bolus of food</p> Signup and view all the answers

    How long does it take for solid food to pass through the oropharynx to the stomach?

    <p>8 seconds</p> Signup and view all the answers

    What is the function of the pylorus region in the stomach?

    <p>To hold 30 ml of chyme and act as a dynamic filter</p> Signup and view all the answers

    What is the result of the absence of intrinsic factor in the stomach?

    <p>Pernicious anemia</p> Signup and view all the answers

    What is the primary function of the stomach in the digestive process?

    <p>To secrete gastric juice and churn food</p> Signup and view all the answers

    What is a common cause of vomiting or emesis?

    <p>Presence of irritants such as bacterial toxins</p> Signup and view all the answers

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