Block 6 Gastrophysiology Brs W Expl

23 Questions | Total Attempts: 695

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Human Anatomy Quizzes & Trivia

Gastrointestinal physiology, or gastrophysiology for short, is a physiological branch of study which deals primarily with the physical function of the gastrointestinal tract, which involves processing food by mechanical and chemical means, extract nutrients and to excrete waste products. Can you tell us about all of these particular functions of the gastrointestinal tract? Let’s find out in the following quiz all about gastrophysiology! Good luck! You might need it!


Questions and Answers
  • 1. 
    • A. 

      Secretin

    • B. 

      Gastrin

    • C. 

      Cholecystokinin (CCK)

    • D. 

      Vasoactive intestinal peptide (VIP)

    • E. 

      Gastric inhibitory peptide (GIP)

  • 2. 
    Which of the following is the site of secretion of intrinsic factor?
    • A. 

      Gastric antrum

    • B. 

      Gastric fundus

    • C. 

      Duodenum

    • D. 

      Ileum

    • E. 

      Colon

  • 3. 
    Vibrio cholerae causes diarrhea because it
    • A. 

      Increases HCO3- secretory channels in intestinal epithelial cells

    • B. 

      Increases Cl- secretory channels in crypt cells

    • C. 

      Prevents the absorption of glucose and causes water to be retained in the intestinal lumen isosmotically

    • D. 

      Inhibits cyclic adenosine monophosphate (cAMP) production in intestinal epithelial cells

    • E. 

      Inhibits inositol 1,4,5-triphosphate (IP3) production in intestinal epithelial cells

  • 4. 
    Cholecystokinin (CCK) has some gastrinlike properties because both CCK and gastrin
    • A. 

      Are released from G cells in the stomach

    • B. 

      Are released from I cells in the duodenum

    • C. 

      Are members of the secretin-homologous family

    • D. 

      Have five identical C-terminal amino acids

    • E. 

      Have 90% homology of their amino acids

  • 5. 
    Which of the following is transported in intestinal epithelial cells by a Na+-dependent cotransport process?
    • A. 

      Fatty acids

    • B. 

      Triglycerides

    • C. 

      Fructose

    • D. 

      Alanine

    • E. 

      Oligopeptides

  • 6. 
    • A. 

      The liver bile acid pool increases

    • B. 

      Chylomicrons do not form in the intestinal lumen

    • C. 

      Micelles do not form in the intestinal lumen

    • D. 

      Dietary triglycerides cannot be digested

    • E. 

      The pancreas does not secrete lipase

  • 7. 
    • A. 

      Gastric emptying

    • B. 

      Pancreatic HCO 3- secretion

    • C. 

      Pancreatic enzyme secretion

    • D. 

      Contraction of the gallbladder

    • E. 

      Relaxation of the sphincter of Oddi

  • 8. 
    Which of the following abolishes a receptive relaxation of the stomach?
    • A. 

      Parasympathetic stimulation

    • B. 

      Sympathetic stimulation

    • C. 

      Vagotomy

    • D. 

      Administration of gastrin

    • E. 

      Administration of vasoactive intestinal peptide (VIP)

    • F. 

      Administration of cholecystokinin (CCK)

  • 9. 
    Secretion of which of the following substances is inhibited by low pH?
    • A. 

      Secretin

    • B. 

      Gastrin

    • C. 

      Cholecystokinin (CCK)

    • D. 

      Vasoactive intestinal peptide (VIP)

    • E. 

      Gastric inhibitory peptide (GIP)

  • 10. 
    Which of the following is the site of secretion of gastrin?
    • A. 

      Gastric antrum

    • B. 

      Gastric fundus

    • C. 

      Duodenum

    • D. 

      Ileum

    • E. 

      Colon

  • 11. 
    • A. 

      Glycerol

    • B. 

      Galactose

    • C. 

      Leucine

    • D. 

      Bile acids

    • E. 

      Vitamin B12

    • F. 

      Vitamin D

  • 12. 
    Which of the following changes occurs during defecation?
    • A. 

      Internal anal sphincter is relaxed

    • B. 

      External anal sphincter is contracted

    • C. 

      Rectal smooth muscle is relaxed

    • D. 

      Intra-abdominal pressure is lower than when at rest

    • E. 

      Segmentation contractions predominate

  • 13. 
    Which of the following is characteristic of saliva?
    • A. 

      Hypotonicity relative to plasma

    • B. 

      A lower HCO3- concentration than plasma

    • C. 

      The presence of proteases

    • D. 

      Secretion rate that is increased by vagotomy

    • E. 

      Modification by the salivary ductal cells involves reabsorption of K+ and HCO3-

  • 14. 
    Which of the following substances is secreted in response to an oral glucose load?
    • A. 

      Secretin

    • B. 

      Gastrin

    • C. 

      Cholecystokinin (CCK)

    • D. 

      Vasoactive intestinal peptide (VIP)

    • E. 

      Gastric inhibitory peptide (GIP)

  • 15. 
    Which of the following is true about the secretion from the exocrine pancreas?
    • A. 

      It has a higher Cl- concentration than does plasma.

    • B. 

      It is stimulated by the presence of HCO3- in the duodenum.

    • C. 

      Pancreatic HCO 3- secretion is increased by gastrin.

    • D. 

      Pancreatic enzyme secretion is increased by cholecystokinin (CCK).

    • E. 

      It is hypotonic.

  • 16. 
    Which of the following substances must be further digested before it can be absorbed by specific carriers in intestinal cells?
    • A. 

      Fructose

    • B. 

      Sucrose

    • C. 

      Alanine

    • D. 

      Dipeptides

    • E. 

      Tripeptides

  • 17. 
    Slow waves in small intestinal smooth muscle cells are
    • A. 

      Action potentials

    • B. 

      Phasic contractions

    • C. 

      Tonic contractions

    • D. 

      Oscillating resting membrane potentials

    • E. 

      Oscillating release of cholecystokinin (CCK)

  • 18. 
    Peristalsis of the small intestine
    • A. 

      Mixes the food bolus

    • B. 

      Is coordinated by the central nervous system (CNS)

    • C. 

      Involves contraction of smooth muscle behind and in front of the food bolus

    • D. 

      Involves contraction of smooth muscle behind the food bolus and relaxation of smooth muscle in front of the bolus

    • E. 

      Involves relaxation of smooth muscle simultaneously throughout the small intestine

  • 19. 
    A patient with a duodenal ulcer is treated successfully with the drug cimetidine. The basis for cimetidine's inhibition of gastric H + secretion is that it
    • A. 

      Blocks muscarinic receptors on parietal cells

    • B. 

      Blocks H2 receptors on parietal cells

    • C. 

      Increases intracellular cyclic adenosine monophosphate (cAMP) levels

    • D. 

      Blocks H+,K+ -adenosine triphosphatase (ATPase)

    • E. 

      Enhances the action of acetylcholine (ACh) on parietal cells

  • 20. 
    • A. 

      Secretin

    • B. 

      Gastrin

    • C. 

      Cholecystokinin (CCK)

    • D. 

      Vasoactive intestinal peptide (VIP)

    • E. 

      Gastric inhibitory peptide (GIP)

  • 21. 
    When parietal cells are stimulated, they secrete
    • A. 

      HCl and intrinsic factor

    • B. 

      HCl and pepsinogen

    • C. 

      HCl and HCO3-

    • D. 

      HCO3- and intrinsic factor

    • E. 

      Mucus and pepsinogen

  • 22. 
    • A. 

      Decreased serum gastrin levels

    • B. 

      Increased serum insulin levels

    • C. 

      Increased absorption of dietary lipids

    • D. 

      Decreased parietal cell mass

    • E. 

      Peptic ulcer disease

  • 23. 
    Which of the following is the site of Na+ bile acid cotransport?
    • A. 

      Gastric antrum

    • B. 

      Gastric fundus

    • C. 

      Duodenum

    • D. 

      Ileum

    • E. 

      Colon