BIO 256 EXAM 1 REVIEW QUESTIONS
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1. Lower oesophageal location and function - ANS ✓end of esophagus and
prevents back flow of stomach contents
2. Functions of stomach - ANS ✓food storage, mechanical digestion,
chemical digestion, production of chyme/intrinsic factor
3. Parietal cells secrete - ANS ✓intrinsic factor and hcl
4. Chief cells secrete - ANS ✓pepsinogen and gastric lipase
5. Glycoprotein that aids in vitamin B12 absorption - ANS ✓intrinsic
factor
6. Hcl function - ANS ✓activates pepsinogen, denatures proteins, kills
microbes in food
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7. Pepsinogen function - ANS ✓activated by pepsin, breaks down proteins,
protein digestion completed in small intestine
8. Gastric lipase function - ANS ✓plays minor roll in lipid digestion, rest
digested in small intestine
9. How is the stomach protected and which cells secrete mucus - ANS
✓mucous coat, tight junctions, epithelial cell replacement; and mucosa
cells
10. What causes stomach ulcers - ANS ✓breakdown of protective
measures (mucous coat, tight junctions, epithelial cell replacement) or
acid-resistant bacteria (helicobacter pylori)
11. Pyloric sphincter location and function - ANS ✓at the junction of
the stomach and the small intestine;
12. Regulates the passage of chyme from the stomach into the
small intestine and regulates food movement
13. Three layers of smooth muscle in stomach - ANS ✓longitudinal,
circular, oblique (inner to outer)
BIO 256
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