Physiology (Gastro-Intestinal Tract) Set 1

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Physiology (Gastro-Intestinal Tract) 1

MCQ

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1. Choose the correct listing of the anatomical divisions of the stomach in the direction food normally
passes :

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2. Which tissue layer provides for primary digestive motility?

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3. Which of the following ions has the highest concentration in saliva under basal conditions?

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4. Which is the primary absorptive organ of the digestive system?

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5. The proenzyme pepsinogen is secreted mainly from which of the following structures?

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6. Which of the following is the main digestible carbohydrate normally consumed in the human diet?

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7. Some absorption occurs in the large intestine, but this is mostly limited to :

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8. The progressive wave of muscle contractions that proceeds along the esophagus, compressing the
lumen and forcing food ahead of it is called:

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9. Proteins are primarily digested to and absorbed as :

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10. Which of the following is characteristic of the segmenting movements in the small intestine?

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11. Digestion of which of the following foodstuffs is impaired to the greatest extent in patients with
achlorhydria?

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12. The major chemical digestive activity that takes place in the stomach is :

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13. HCL secretion by the stomach :

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14. Vitamin B12 is absorbed mainly in the:

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15. What prevents food from entering the nasal passages during swallowing?

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16. Which of the following is NOT involved in swallowing?

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17. Compared to plasma, saliva has the highest relative concentration of which of the following ions
under basal conditions?

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18. Saliva contains the carbohydrate-digesting enzyme

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19. Of the approximately 9 liters of water that go through the GI tract daily, how much makes it out in
the feces?

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20. Which of the following food substances requires chewing for digestion?

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21. during swallowing:

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22. Which of the following has little effect on pancreatic secretion or it's components?

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23. Which of the following is NOT normally found in abundance in the portal blood?

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24. Which of the following salivary components continues to be active in the acidic environment of the
stomach?

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25. Defective parietal cells would result in malabsorption of which vitamin?

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