Acetylcholine Pathway in Salivary Gland Cells
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Questions and Answers

What is the primary function of the intrinsic factor secreted by the stomach?

  • To aid in the mechanical digestion of food
  • To facilitate the absorption of vitamin B-12 in the intestines (correct)
  • To neutralize stomach acid
  • To break down dietary protein

    • Which of the following is NOT a function of the stomach?

  • Autoclave (high acidity)
  • Mechanical digestion
  • Secretion of digestive enzymes (correct)
  • Protein hydrolysis

    • Which region of the stomach contains the gastric pits and glands?

  • All regions of the stomach contain gastric pits and glands (correct)
  • Corpus
  • Antrum
  • Fundus

    • What is the primary function of saliva secreted by the salivary glands?

    <p>Lubrication and moisturization of the oral cavity</p> Signup and view all the answers

    Which of the following stimuli inhibits the salivary gland's secretion of saliva?

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

    How does the salivary nervous system stimulate salivary secretion?

    <p>Through the release of norepinephrine, which binds to beta-adrenergic receptors on salivary gland cells</p> Signup and view all the answers

    What is the relationship between the concentrations of Na+ and Cl- in saliva compared to plasma?

    <p>Saliva has lower concentrations of Na+ and Cl- than plasma</p> Signup and view all the answers

    What is the relationship between the concentration of K+ in saliva compared to plasma?

    <p>Saliva has higher K+ concentration than plasma</p> Signup and view all the answers

    How does the HCO3- concentration in saliva compare to plasma at low flow rates?

    <p>Saliva has lower HCO3- concentration than plasma</p> Signup and view all the answers

    How does the HCO3- concentration in saliva compare to plasma at high flow rates?

    <p>Saliva has higher HCO3- concentration than plasma</p> Signup and view all the answers

    Which enzyme in saliva can hydrolyze triglycerides without the help of bile salts?

    <p>Lingual lipase</p> Signup and view all the answers

    What is the primary regulation of the salivary glands?

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

    What is the primary role of the sympathetic nervous system in relation to the GI system?

    <p>Inhibits motor activities of the GI system</p> Signup and view all the answers

    Which component in saliva plays a crucial role in regulating the pH of saliva?

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

    What percentage of water is absorbed by the small intestine?

    <p>78%</p> Signup and view all the answers

    What is one of the key functions of saliva in the oral cavity, besides digestion?

    <p>Maintaining pH in the oral cavity</p> Signup and view all the answers

    How does the flow rate of saliva impact the concentration of potassium (K+)?

    <p>Increased flow rate decreases K+ concentration</p> Signup and view all the answers

    What happens to the pH of saliva as the flow rate increases?

    <p>The pH becomes more basic</p> Signup and view all the answers

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