PracticeExam_FinalKEY_F10-1 - Final Practice Exam (covers...

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Final Practice Exam (covers new topics only; study the old exams for the previous topics—see study guides and final study tips): 1. Choose the animal with a closed circulatory system: a. Grasshopper b. Snail c. Earthworm d. None of the above 2. Amphibians are unique in that a. They are the only vertebrates with an open circulatory system b. Oxygen diffuses into their blood through the gills c. Oxygen diffuses into the blood from the lungs or through the skin d. They have a four-chambered heart 3. Receptors which sense a drop in blood pressure are called? a. stretch receptors b. baroreceptors c. chemoreceptors d. none of the above 4. Hemolymph differs from blood in that it a. Does not contain blood cells b. Is a mixture of blood and interstitial fluid c. Circulates through closed circulatory systems only d. Does not pass through the heart 5. What produces systolic blood pressure? a. contraction of the right atrium b. contraction of the left atrium c. relaxation of the ventricles d. contraction of the ventricles 6. The heart structure that functions as the initial receiving chamber is the: a. right atrium b. right ventricle c. aorta d. left atrium 7. If someone has a blood pressure reading of 110/30 mmHg, the higher number is the: a. Diastolic blood pressure reading b. Systolic blood pressure reading c. Pulse pressure d. Heart rate 8. The most important factor in the return of blood flow back to the heart is __________. a. skeletal muscle contraction b. valves in the veins c. the pumping of the heart d. high pressure
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9. Gas and nutrient exchange between circulation and the tissues occurs at the: a. Arteries b. Arterioles c. Venules d. Capillaries 10. Cardiac output is best described as: a. The total amount of blood being pumped by the left ventricle b. Stroke volume x heart rate c. Inversely proportional to metabolic rate d. All of the above 11. Which of the following statements most accurately describes the structure of hemoglobin? a. Hemoglobin consists of four subunits, each of which has a heme group containing an iron ion. One hemoglobin molecule can bind a total of four O 2 molecules. b. Hemoglobin consists of a single subunit with a heme center containing an iron ion that binds one molecule of O 2 . c. Hemoglobin consists of a single subunit chain with a copper center that binds two molecules of O 2 . d. Hemoglobin consists of three subunits, each of which has a heme group containing a copper ion. One hemoglobin molecule can bind a total of three O 2 molecules. 12. Which of the following people would have the HIGHEST blood pressure during ventricular relaxation? a. a person with a diastolic pressure of 90 b. a person with a systolic pressure of 130 c. a person with a blood pressure of 110/70 d. a person with a blood pressure of 100/80 13. What would happen if a person received a drug that acted as a thrombin inhibitor? a.
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PracticeExam_FinalKEY_F10-1 - Final Practice Exam (covers...

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