L12 QS BANK, BMS204 PDF

Part One: Simple MCQs 1. What is the normal cardiac output (COP) at rest? a) 1 liter/minute b) 3 liters/minute c) 5 liters/minute d) 10 liters/minute 2. What is the ejection fraction (EF) a sensitive indicator of? a) Myocardial contractility b) Venous return c) Heart rate d) Blood pressure 3. Wh...

Part One: Simple MCQs 1. What is the normal cardiac output (COP) at rest? a) 1 liter/minute b) 3 liters/minute c) 5 liters/minute d) 10 liters/minute 2. What is the ejection fraction (EF) a sensitive indicator of? a) Myocardial contractility b) Venous return c) Heart rate d) Blood pressure 3. What is the main factor that returns blood to the heart? a) Gravity b) Respiratory movements c) The pumping action of the heart d) Skeletal muscle contraction 4. What happens to venous return during inspiration? a) Increases b) Decreases c) Remains the same d) None of the above 5. What is the effect of gravity on venous return from parts above the level of the heart in the erect position? a) Helps venous return b) Reduces venous return c) No effect d) None of the above 6. What happens to venous return in hemorrhage? a) Decreases b) Increases c) Remains the same d) None of the above 7. What is the effect of vasodilatation of arterioles on venous return? a) Increases b) Decreases c) No effect d) None of the above 8. What is the effect of vasodilatation of veins on venous return? a) Decreases b) Increases c) No effect d) None of the above 9. What is the effect of increased blood pressure on end diastolic volume (EDV)? a) Increases b) Decreases c) No effect d) None of the above 10. What happens to stroke volume (SV) when the heart rate (HR) slows? a) Increases b) Decreases c) Remains the same d) None of the above Part Two: Complex MCQs 1. Which of the following is NOT a factor that influences venous return? a) The pumping action of the heart b) Pressure gradient c) Ejection fraction d) Respiratory movements 2. What is the mean circulatory pressure (MCP) in peripheral venules and veins in the recumbent position? a) 0-2 mm Hg b) 3-4 mm Hg c) 7-8 mm Hg d) 10-12 mm Hg 3. What is the effect of increased venous return on cardiac output (COP)? a) Increases COP b) Decreases COP c) No effect on COP d) None of the above 4. What is the effect of decreased venous return on end diastolic volume (EDV)? a) Decreases EDV b) Increases EDV c) No effect on EDV d) None of the above 5. What is the effect of skeletal muscle contraction on venous return (VR) and cardiac output (COP)? a) Increases VR and COP b) Decreases VR and COP c) No effect on VR and COP d) None of the above 6. What is the effect of increased blood volume on venous return (VR) and cardiac output (COP)? a) Increases VR and COP b) Decreases VR and COP c) No effect on VR and COP d) None of the above 7. What is the effect of vasodilatation of capillaries on venous return (VR) and cardiac output (COP)? a) No effect on VR and COP b) Increases VR and COP c) Decreases VR and COP d) None of the above 8. What is the effect of arterial pulsation on venous return (VR) and cardiac output (COP)? a) Increases VR and COP b) Decreases VR and COP c) No effect on VR and COP d) None of the above 9. What happens to the stroke volume (SV) when the blood pressure rises suddenly? a) Decreases initially, then increases b) Increases c) Decreases d) No effect 10. What is the effect of systemic hypertension on cardiac output (COP)? a) COP may be normal b) COP increases c) COP decreases d) None of the above 11. What happens to stroke volume (SV) when the heart rate (HR) accelerates, with constant venous return (VR)? a) Decreases b) Increases c) Remains the same d) None of the above 12. What is the effect of marked acceleration or slowing of the heart rate (HR) on cardiac output (COP), with constant venous return (VR)? a) Decreases COP b) Increases COP c) No effect on COP d) None of the above 13. What is the relationship between stroke volume (SV) and cardiac output (COP) and contractility? a) Directly proportional b) Inversely proportional c) No relationship d) None of the above 14. What happens to the ventricles when venous return (VR) increases, as in muscular exercise? a) Dilate b) Constrict c) No effect d) None of the above 15. What happens to the initial length of the cardiac muscle fiber during diastole when venous return (VR) increases? a) Increases b) Decreases c) No effect d) None of the above 16. What is the effect of increased venous return (VR) on the force of ventricular contraction? a) Increases b) Decreases c) No effect d) None of the above 17. What is the effect of increased venous return (VR) on stroke volume (SV) and cardiac output (COP)? a) Increases SV and COP b) Decreases SV and COP c) No effect on SV and COP d) None of the above 18. What is the effect of increased heart rate (HR) on cardiac output (COP) when venous return (VR) is also increased? a) Important to increase COP b) Decreases COP c) No effect on COP d) None of the above 19. What is the effect of increased stroke volume (SV) on cardiac output (COP) when venous return (VR) is also increased? a) Markedly increases COP b) Decreases COP c) No effect on COP d) None of the above 20. What is the approximate increase in cardiac output (COP) during muscular exercise due to increased venous return (VR) and heart rate (HR)? a) 2-3 folds b) 4-5 folds c) 7-8 folds d) 10-12 folds Answer Guide Part One 1. c 2. a 3. c 4. a 5. a 6. a 7. a 8. a 9. a 10. a Part Two 1. c 2. c 3. a 4. a 5. a 6. a 7. a 8. a 9. a 10. a 11. a 12. a 13. a 14. a 15. a 16. a 17. a 18. a 19. a 20. c Done