118exam4-fall06 - Biology 118 Nov. 22, 2006 EXAM 4 -...

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Nov. 22, 2006 EXAM 4 - VERSION A ..) on your answer sheet. You can keep this list of exam questions. You may write on it if you wish. This form will be the only way you will know what answers you marked on the scantron. Each question has only 1 correct answer. Indicate your choice on the answer sheet - scantron. If you are stumped by a question, place a mark by it, and return to it later. > = greater than HDL = high density lipoprotein < = less than RV = right ventricle AV = atrioventricular HP = hydrostatic pressure LDL = low density lipoprotein SA = sinoatrial node BP = blood (hydrostatic) pressure HR = heart rate OP = osmotic pressure SR = sarcoplasmic reticulum CO = cardiac output IRV = inspiratory reserve volume RA = right atrium SV = stroke volume CRP = C-reactive protein LA = left atrium RMV = respiratory minute volume TV = tidal volume ERV = expiratory reserve volume LV = left ventricle RR = respiration rate VC = vital capacity 1. The ______ is the strongest chamber of the heart while the _____ is(are) the weakest. a. RV - atria b. LV - atria c. RV - LV d. LV - RV 2. Which blood vessel carries deoxygenated blood? a. vena cava b. pulmonary vein c. aorta d. 3. The AV valves of the heart are closed when the ventricles ________ and the atria __________. a. contract - contract b. are relaxed - contract c. contract - are relaxed d. are relaxed - are relaxed 4. Heart valves may be damaged by _____________, which can lead to impaired blood flow through the heart. a. cholesterol deposits b. age related stiffening c. some infections d. all of these 5. Cardiac muscle cells have more _________ than white fiber skeletal muscle cells. a. sarcomeres b. myoglobin c. nuclei d. SR 6. Aerobic exercise benefits the heart by increasing ____________. a. the number of cardiac stem cells b. the number of mature cardiac cells c. blood flow to the heart muscle tissue d. the relative size of each cell’s SR 7. Trace the “shortest” pathway of blood past/through these structures after the blood exits the left atrium: 1 - semilunar valves, 2 - AV valves, 3 - aorta, 4 - vena cava, 5 - systemic capillaries, 6 - left ventricle: a. 2, 6, 1, 3, 5, 4 b. 1, 6, 2, 3, 5, 4 c. 2, 6, 1, 4, 5, 3 d. 1, 6, 2, 4, 5, 3 8. The heart’s conduction fibers send electrical signals through the heart ______ because they are ______ than other cardiac muscle cells. a.
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118exam4-fall06 - Biology 118 Nov. 22, 2006 EXAM 4 -...

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