Special Circulations — Cardiovascular Physiology

Special Circulations MCQs: practice questions

Sample Special Circulations multiple-choice questions from Cardiovascular Physiology.

1. During exercise, total peripheral resistance usually:

   • A. Increases because all beds constrict
   • B. Increases markedly
   • C. Remains fixed
   • D. Becomes zero
   • E. Decreases

2. A left-to-right ventricular shunt can make pulmonary blood flow:

   • A. Less than systemic blood flow
   • B. Greater than systemic blood flow
   • C. Zero
   • D. Independent of right ventricular output
   • E. Equal to renal blood flow

3. The pulmonary circulation has a vascular resistance that is:

   • A. Independent of pressure
   • B. Much higher than systemic resistance
   • C. Equal to systemic resistance
   • D. Much lower than systemic resistance
   • E. Absent

4. During acute hemorrhage, sympathetic redistribution preferentially preserves flow to the:

   • A. Skin and splanchnic organs
   • B. Heart and brain
   • C. Kidneys only
   • D. Skeletal muscle only
   • E. Adipose tissue

5. The cutaneous circulation is controlled predominantly by:

   • A. Somatic motor nerves
   • B. Parasympathetic nerves
   • C. Sympathetic nerves
   • D. Vagus nerves
   • E. Enteric nerves

6. The kidneys receive a large fraction of cardiac output primarily to support:

7. Renal blood flow is altered when renal vascular:

8. During exercise, cardiac output generally:

9. Which group contains important local vasodilators in exercising skeletal muscle?

10. During exercise, pulse pressure usually:

11. During exercise, local metabolic control in skeletal muscle can override:

12. Reactive hyperemia helps repay:

13. Cutaneous blood flow is particularly important for:

14. During dynamic exercise, skeletal muscle blood flow increases primarily because of:

15. In a normal adult at steady state, pulmonary blood flow is:

16. Increased ambient temperature causes cutaneous blood vessels to:

17. Coronary blood flow to the left ventricular myocardium is greatest during:

18. Coronary vasodilation during increased cardiac work primarily serves to:

19. The brain maintains relatively stable blood flow over a range of pressures through:

20. Severe cerebral ischemia can produce systemic hypertension by increasing activity of the:

21. The wheal of the skin triple response results from:

22. Increased cerebral PCO2 causes cerebral arterioles to:

23. A major consequence of cerebral vasoconstriction would be:

24. During significant hemorrhage, renal blood flow generally:

25. The cerebral circulation is particularly sensitive to changes in:

26. Increased myocardial O2 demand normally causes coronary arterioles to:

27. During hemorrhage, splanchnic vascular resistance generally:

28. During exercise, arterial pressure generally:

29. Coronary blood flow supplies the:

30. Reactive hyperemia after release of an arterial occlusion is caused mainly by: