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Unformatted text preview: Biology 118 March 22, 2006 EXAM 4 - VERSION A Mark your name, ID number & test version (A, B, C, D...) 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 need clarification for a question, raise your hand & stay in your seat. I will come to you. If you are stumped by a question, place a mark by it, and return to it later. > = greater than < = less than AV = atrioventricular LDL = low density lipoprotein BP = blood (hydrostatic) pressure (mmHg) OP = osmotic pressure (mmHg) R = resistance CO = cardiac output RMV = respiratory minute volume CRP = C-reactive protein RA = right atrium ERV = expiratory reserve volume RR = respiration rate HDL = high density lipoprotein RV = right ventricle HP = hydrostatic pressure SA = sinoatrial node HR = heart rate SR = sarcoplasmic reticulum IRV = inspiratory reserve volume SV = stroke volume LA = left atrium TV = tidal volume LV = left ventricle VC = vital capacity 1. The systemic circuit may deliver blood to the ___________. a. brain b. heart c. spleen d. all of these 2. Trace the pathway of blood after it exits the pulmonary artery: 1 - pulmonary veins, 2 - LA, 3 - AV valve, 4 - lung capillaries, 5 - LV, 6 - semilunar valve. a. 4, 1, 2, 3, 5, 6 b. 2, 6, 5, 3, 1, 4 c. 4, 1, 2, 6, 5, 3 d. 5, 6, 1, 4, 3, 2 3. The strongest chamber of the heart is the _________ because it pushes blood the ____________ distance. a. RV - shortest b. LV - longest c. RA - shortest d. LA - longest 4. Semilunar valves open when the ventricular blood pressure is __________ the blood pressure in the _________. a. < - artery b. < - atrium c. > - artery d. > - atrium 5. Heart valve stenosis (narrowing) may be caused by ____________ that damage(s) the valves. a. aerobic exercise b. smooth muscle weakening c. cholesterol deposits d. faulty gap junctions 6. Cardiac muscle cells have more _________ than red fiber skeletal muscle cells. a. nuclei b. sarcomeres c. SR d. branches 7. The heart is said to act as a single motor unit because electrical signals (action potentials) travel directly between cells through their ____________. a. capillaries b. gap junctions c. myofibrils d. SR 8. Which line on figure A, best describes the relationship between filling of the heart with blood (empty to normal filling) on the X-axis & contractile force (tension) on the Y-axis? a. V b. W c. X d. Z 9. Which of these blood vessels carries deoxygenated blood? a. vena cava b. aorta c. carotid artery d. pulmonary vein 10. The hearts pacemaker cells are modified ________ cells that __________ contract....
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