HSS 394 Fall 09 Exam 2 Alternate Order with Answers

HSS 394 Fall 09 Exam 2 Alternate Order with Answers - 1....

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1. Red blood cells account for nearly 100% of the volume of the "formed elements" of the blood. *a. True b. False 2. The heart must receive an impulse from the sympathetic nervous system in order to contract. a. True *b. False 3. An increase in red blood cells without an equivalent increase in plasma volume results in a. hemodilution *b. increased blood viscosity c. dehydration d. hypertension 4. The distribution of blood to various tissue areas is controlled mainly by the constriction and dilation of a. veins b. arteries c. venules *d. arterioles e. capillaries 5. The average hematocrit for a human is approximately _____%. a. 15 to 20 b. 30 to 40 *c. 40 to 45 d. 60 to 70 6. Intrinsic control of blood flow may be accomplished through a. release of acetylcholine and adenosine b. increased oxygen demand c. increases in carbon dioxide, K + , H + , lactic acid *d. All of these are correct. 7. During exercise, blood flow a. remains the same as blood flow during rest *b. is shunted toward exercising tissue c. is directed toward the heart
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d. is directed to the brain 8. The most important variable that determines resistance to blood flow is a. heart rate b. the viscosity of the blood c. the length of the blood vessels *d. the diameter of the vessel 9. Which of the following is incorrect ? *a. SV = ESV - EDV b. EF = (SV/EDV) × 100 c. Q = HR × SV 10. The volume of blood in the ventricles at the end of ventricular filling is called a. end systolic volume b. afterload *c. end diastolic volume d. stroke volume 11. Stroke volume equals a. end systolic volume minus end diastolic volume b. end systolic volume multiplied by heart rate *c. end diastolic volume minus end systolic volume d. end diastolic volume multiplied by heart rate 12. The cardiac cycle is *a. the time between one systole to the next systole b. described as the events between the T-wave and the P-wave c. longer in the systolic phase versus the diastolic phase d. All of these are correct. 13. The volume of blood pumped by the heart per minute is referred to as
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This note was uploaded on 01/22/2011 for the course HSS 394 taught by Professor Jones during the Fall '09 term at University of Louisville.

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HSS 394 Fall 09 Exam 2 Alternate Order with Answers - 1....

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