B2fnlProbSetKEY07

B2fnlProbSetKEY07 - BILD 2 Winter Quarter, 2006 1 Name KEY...

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BILD 2 1 Name KEY Winter Quarter, 2006 BILD 2 FINAL PROBLEM SET Winter Quarter, 2006 [This was the final exam previoiusly in this course.] [Omit #12 which was not covered this year.] __________ 1. ( 5 points) Print your name on all 9 pages. __________ 2. (10 points) Answer only the question asked. __________ 3. (15 points) Answer each question in the space provided __________ 4. (10 points) but provide all relevant detail possible. __________ 5. (10 points) __________ 6. (15 points) __________ 7. (10 points) __________ 8. (15 points) __________ 9. (15 points) __________ 10. (10 points) TOTAL POINTS ON FINAL EXAM __________ __________ 11. (15 points) __________ 12. (15 points) TOTAL POINTS IN COURSE _______________ __________ 13. (15 points) __________ 14. (15 points) __________ 15. (10 points) __________ 16. (10 points) COURSE GRADE __PROBLEM SET KEY __ __________ 17. (15 points) __________ 18. (10 points) __________ 19. (15 points) __________ 20. (15 points) __________ 21. (10 points) __________ 22. (15 points) __________ 23. (20 points) __________ 24. ( 5 points) KEY __________________________________ ___________________ Signature Date
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BILD 2 2 Name KEY Winter Quarter, 2006 1. (5 points) What are the bulk requirements for heterotrophs? carbohydrates essential amino acids essential fatty acids 2. (10 points) What is the difference between an exocrine and an endocrine gland? Which is the thyroid? the anterior pituitary? the pancreas? Exocrine: secretes outside the blood supply, e.g. into the lumen of the vertebrate gut. Endocrine: secretes into the blood suppy. Thryoid: endocrine Anterior Pituitary: endocrine Pancreas: both 3. (15 points) What produces stomach acid and what functions does it serve? How is it regulated Parietal cells in the stomach lining secrete HCl into the stomach lumen. The acid (1) denatures proteins and foodstuffs, (2) kills microbes, and (3) activates pepsinogen , releasing the endoprotease pepsin. Regulation occurs by food entering the stomach which triggers cells in the stomach wall to release the hormone gastrin into the blood supply where it stimulates HCl release from the parietal cells. As chyme leaves the stomach the acid is neutralized in the small intestine (duodenum) by HCO 3 - secreted by the pancreas. 4. (10 points) How are generator potentials different from synaptic potentials (initiation, location, function)? Generator potentials are induced in sensory neurons by physical sensory stimuli (e.g. stretch, touch, pain, pressure) acting through receptors/detectors to depolarize the membrane; their function is to use action potential frequency as a way to encode information about the intensity of the sensory stimulus. Synaptic potentials are induced locally at postsynaptic sites by neurotransmitter acting on ionotropic or metabotropic receptors to produce currents that alter the membrane potential ; their function is to influence either positively (excitatory) or negatively (inhibitory) the ability of the cell to fire an action potential.
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This note was uploaded on 06/05/2008 for the course BILD 2 taught by Professor Schroeder during the Winter '08 term at UCSD.

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B2fnlProbSetKEY07 - BILD 2 Winter Quarter, 2006 1 Name KEY...

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