Practice Final Exam Questions

Practice Final Exam Questions - BILD 2 Winter 2009 Practice...

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BILD 2 Winter 2009 Dr. Towb Practice Final Exam Questions 3/9/09 1) Of the carbohydrates, fats, and proteins in a hamburger, what has been partially digested prior to entry into the small intestine? 2) Why are there multiple proteases during different stages of digestion? Won’t just one do the trick? 3) What does the acidic environment of the stomach do to ingested proteins? How does this aid protein digestion? 4) What causes the pH change in the “digestive broth” that is released from the stomach into the small intestine? Why is there a change in pH at this point in human digestion (what purpose does it serve)? 5) Cells must be bathed continuously in an aqueous medium to take in oxygen and nutrients and get rid of waste products via diffusion. Diffusion is efficient over only short distances. In fact, diffusion is efficient only for a distance of about three cell diameters maximum (approx. 200 to 300 μm). Note the following times required for oxygen to diffuse specific distances:
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This note was uploaded on 07/25/2009 for the course BILD 2 taught by Professor Schroeder during the Fall '08 term at UCSD.

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Practice Final Exam Questions - BILD 2 Winter 2009 Practice...

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