24. Hemorhage with a large loss of blood causes a. decrease blood pressure due d

Question

24. Hemorhage with a large loss of blood causes a. decrease blood pressure due decrease in cardiac output b. increase blood pressure due to increase blood volume c. no change in blood pressure but a decrease in heart rate d. increase blood pressure and increase stroke volume 25. How does obesity contribute to high blood pressure? a. b. c. d. c. Increasing blood viscosity Increasing vessel diameter Increasing blood vessel length All of the above Both B and C 26. Which of the following is NOT considered a direst factor in vascular resistance? the length of blood vessels the viscosity of blood the diameter of blood vessels venous pressure a. b. e. d. 27. Which of the following would have the least effect on resistance? a. b. c. d. c. doubling the length of a vessel doubling the diameter of a vessel doubling viscosity of blood doubling the volune of blood doubling the number of RBCs in blood 28. order to initiate a reversal in the BP During a drop in Tom's BP, the enzymeis released by the of the kidneys, in a. prothrombin; Bowmans' capsule reninju adrenal renin, juxtaglomerulus apparatus b. angiotensin, adrenal medulla d. angiotensis II; adrenal cortex e ACE enzyme; juxtaglomerulus apparatus 29. Which of the following would NOT increase vascular resistance? 1. vasodilation 3. obesity 4. dehydration 5. atherosclerosis a. 1 and2 b. 1, 3 and 4 c. I and S d. 4 and 5 e. 1 only

Explanation / Answer

24) ans:A .. Haemorhage is a condition in which blood escapes from the ruptured blood vessel.due to the severe blood loss the Blood pressure decreases because of boyles law (the pressure is directly propotional to the volume at constant temparature).

due to the decrease in blood volume venous return decreases.it leads to decrease in end diastolic volume(EDV)).due to drcrease in EDV the stroke volume decreases.cardiac output depend on stroke volume.so cardiac output also decreases.

cardiac out put=stroke volume X heart rate

25)A....obesity is the condition of being overweight and BMI greatr than 25.in the obese people the serum lipids levels alters.it leads to increase in the plasma fibrinogen levels.these fibrinogen enhances erythrocyte aggregation.it leads to inrease in blood visosity.

28)c.....the juxta medullary apparatus present in the nephron releases the rennin enzyme.it converts the angiotensinogen to angiotensn 1.this AT1 is converted to AT2 in presence of angiotensin converting enzyme.this AT2 increasesthe sodium retention and increases BP

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