Human Digestive System Quiz
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Questions and Answers

Which stage of digestion begins with secretions from gastric glands in response to the sight and smell of food?

  • Pre-absorptive phase
  • Intestinal phase
  • Gastric phase
  • Cephalic phase (correct)
  • Which enzyme, found in saliva, aids in the chemical breakdown of food in the mouth?

  • Amylase (correct)
  • Lipase
  • Trypsin
  • Pepsin
  • Where does the gastric phase of digestion primarily occur?

  • Stomach (correct)
  • Large intestine
  • Esophagus
  • Small intestine
  • Which organ produces a number of enzymes involved in the digestion of partially digested food in the duodenum?

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

    What is the function of lingual lipase in the process of digestion?

    <p>Initiating the breakdown of fats in the mouth</p> Signup and view all the answers

    In land animals, where does gas exchange occur in the respiratory system?

    <p>Alveoli in mammals and atria in birds</p> Signup and view all the answers

    What is the function of the bronchioles in the respiratory system of mammals and birds?

    <p>They generally open into the microscopic alveoli in mammals and atria in birds</p> Signup and view all the answers

    What is the primary function of the trachea in the respiratory system?

    <p>To provide a passage for air to enter the lungs</p> Signup and view all the answers

    What is the role of the air sacs in the respiratory system of land animals?

    <p>To bring the air into close contact with the blood</p> Signup and view all the answers

    What is the main purpose of the muscles of respiration in the respiratory system?

    <p>To pump air from the environment into the alveoli or atria</p> Signup and view all the answers

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