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Exam 4 Answers for Posting(1)

Exam 4 Answers for Posting(1) - Exam 4 Answers BISC 307L...

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1 Exam 4 Answers, BISC 307L May 4, 2016 1. At the arteriolar end of a particular capillary, blood pressure is 30 mm Hg, hydrostatic pressure in the surrounding interstitial space is -2 mm Hg, the osmotic pressure exerted by plasma proteins is 25 mm Hg, and the osmotic pressure exerted by interstitial proteins is 2 mm Hg. What is the direction of fluid movement across the capillary wall, and the net driving force? (f) a. absorption, 5 mm Hg d. filtration, 5 mm Hg b. absorption, 7 mm Hg e. filtration, 7 mm Hg c. absorption, 9 mm Hg f. filtration, 9 mm Hg 2. Indicate whether each of the following statements is true or false by wri ting the word “True” or “False” in the blank. Do not write T or F. ANS: a-T, b-T, c-T, d-F ___________ a. A mutation that blocked production of clotting factor VII at the beginning of the extrinsic pathway would disrupt blood clotting more than a mutation that blocked production of clotting factor XII at the beginning of the intrinsic pathway. ___________ b. Severe liver disease, such as in chronic hepatitis or advanced cirrhosis, would likely cause generalized edema in the body. ___________ c. An increase in central venous pressure would increase the risk of edema. ___________ d. Plasmin is clotting factor in the intrinsic coagulation pathway. 3. A person who is suspicious of doctors suffered a severe injury while using power tools in his home workshop. He rapidly bleeds 20% of his total blood volume. With liberal application of duct tape, he gets the bleeding under control and, without seeking professional medical help, he recovers without long- term ill effects. If one were to measure his hematocrit immediately after the hemorrhage, and again a few hours later, which one of the following sets of results would most likely be found? (f) a. initial hematocrit low, later hematocrit normal b. initial hematocrit low, later hematocrit low c. initial hematocrit high, later hematocrit normal d. initial hematocrit high, later hematocrit low e. initial hematocrit normal, later hematocrit normal f. initial hematocrit normal, later hematocrit low 4. Indic ate whether each of the following statements is true or false by writing the word “True” or “False” in the blank. Do not write T or F. ANS: a-T, b-F, c-F, d-F ___________ a. P O2 in expired air is greater than in alveolar air. ___________ b. One would expect pulmonary fibrosis to increase lung compliance. ___________ c. During inspiration, the lungs are expanded by increased pressure in the alveoli. ___________ d. Each breath is the result of a single action potential in the nerve(s) to the respiratory muscle(s).
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