Gastro 1
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Questions and Answers

What is the function of the buccal cavity in the digestive system?

  • Absorption of nutrients
  • Elimination of feces
  • Mechanical and chemical breakdown of food (correct)
  • Propulsion of digested products

    • Which part of the digestive system is responsible for the grinding action during mastication?

  • Salivary glands
  • Lips
  • Incisors
  • Molars (correct)

    • What is the primary function of the parotid salivary gland?

  • Elimination of solutes
  • Serous secretion (correct)
  • Mucus secretion
  • Absorption of water

    • During digestion, what is the major component found in saliva?

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

    Which part of the GI tract is responsible for the elimination of feces?

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

    What is the main function of salivary amylase?

    <p>Break down starch into disaccharides</p> Signup and view all the answers

    Which nervous system dominates during stress, leading to dryness of the mouth?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    What is the dual role of the pharynx in the human body?

    <p>Respiration and swallowing</p> Signup and view all the answers

    Which gland secretes a moderate amount of saliva under parasympathetic stimulation?

    <p>Sublingual gland</p> Signup and view all the answers

    What is the main function of lingual lipase in saliva?

    <p>Break down lipids into fatty acids</p> Signup and view all the answers

    Which stage of swallowing is considered involuntary?

    <p>Involuntary pharyngeal stage</p> Signup and view all the answers

    What is the role of the digestive system in mixing and propulsion?

    <p>Propelling food and secretions through the GI tract</p> Signup and view all the answers

    Which process involves enzymatically breaking down large nutrients into smaller molecules in the digestive system?

    <p>Chemical digestion</p> Signup and view all the answers

    What is the main function of mechanical digestion in the digestive system?

    <p>Breaking up and churning food</p> Signup and view all the answers

    Which GI organ is NOT classified as part of the digestive system's accessory organs?

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

    What is the primary function of absorption in the digestive system?

    <p>Absorbing digestive products into the blood and lymph</p> Signup and view all the answers

    What enzyme in saliva is responsible for breaking down starch into disaccharides?

    <p>Salivary amylase</p> Signup and view all the answers

    Which of the following is NOT a function of saliva in the digestive system?

    <p>Initiating protein digestion</p> Signup and view all the answers

    During dehydration, why do salivary glands stop secreting saliva?

    <p>To promote water conservation</p> Signup and view all the answers

    Which phase of the digestive process involves the reflex inhibition of mastication muscles and relaxation of the jaw?

    <p>Swallowing phase</p> Signup and view all the answers

    What is the primary function of lingual lipase in saliva during digestion?

    <p>Breaking down triglycerides into fatty acids and diglycerides</p> Signup and view all the answers

    Which of the following is a primary function of the parasympathetic nervous system in salivation?

    <p>Promoting continuous secretion of a moderate amount of saliva</p> Signup and view all the answers

    What is the primary function of the enzyme pepsin in the digestive system?

    <p>Breaking down proteins into amino acids</p> Signup and view all the answers

    Which part of the digestive system is responsible for the breakdown of starches into maltose?

    <p>Salivary amylase</p> Signup and view all the answers

    What is the primary function of bile in the digestive system?

    <p>Emulsifying fats for better digestion</p> Signup and view all the answers

    Which of the following enzymes is responsible for breaking down fats into fatty acids and glycerol in the small intestine?

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

    During absorption in the small intestine, nutrients are primarily absorbed into which system?

    <p>Circulatory system</p> Signup and view all the answers

    What is the main function of lingual lipase in the digestive system?

    <p>Initiating the breakdown of lipids in the oral cavity</p> Signup and view all the answers

    Which salivary gland secretes both serous and mucus secretions in the mouth?

    <p>Submandibular gland</p> Signup and view all the answers

    What is the primary function of absorption in the digestive system?

    <p>Moving digested products into the bloodstream</p> Signup and view all the answers

    During digestion, which component found in saliva is responsible for maintaining a neutral pH environment?

    <p>Bicarbonate (HCO3)</p> Signup and view all the answers

    What is the primary role of mastication in the digestive process?

    <p>Breaking down food into smaller particles</p> Signup and view all the answers

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