Ch 20 lec

  1. The smooth muscle in the walls of blood vessels is found in which of the following layers?



    B) tunica media
  2. There is not enough blood in the body to fill the entire vascular system at once. About how much of the body's capillaries is closed at any given time?



    D) 3/4
  3. Hypertension is a chronic resting blood pressure higher than which of the following?A)140/70
    B)120/80
    C)130/70
    D)140/90
    D)140/90
  4. Vasodilation may be brought about by



    C) histamine
  5. The most important mechanism of exchange between blood and tissue fluid is ________________.



    A) diffusion
  6. The venous return of blood back to the heart is encouraged by



    D) gravity acting on the large veins above the heart.
  7. The abdominal aorta terminates by dividing into the



    B) common iliac arteries.
  8. Which of the following is not a branch of the abdominal aorta?



    C) intercostal arteries
  9. The right common carotid receives its blood from this artery directly.



    B) brachiocephalic
  10. The artery which is the continuation of the femoral artery after it passes to the posterior side of the thigh is the



    A) popliteal.
  11. Blood vessels that connect two capillary networks are called




    A) portal systems
  12. The tissue layer of a vessel that differs most in thickness when comparing arteries and veins is the




    A) tunica media.
  13. These have the most control of perfusion of a capillary bed.




    E) precapillary sphincters
  14. These structures, present in medium-sized veins, prevent backflow of blood.




    D) venous valves
  15. Pulse pressure equals the systolic pressure minus the diastolic pressure. Mean arterial blood pressure (MAP) equals the sum of the diastolic pressure plus one-third of the pulse pressure. What is the MAP in an individual with a blood pressure of 150/90?



    A) 110
  16. The baroreceptors



    D) All of the above.
  17. All of these factors may increase peripheral resistance except




    C) blood type.
  18. Reduced capillary reabsorption of fluid can lead to edema. Which of the following does not contribute to edema?



    A) extreme muscular activity
  19. The most important mechanism of exchange between blood and tissue fluid is ________________.



    D) diffusion
  20. Which of the following types of low venous return (LVR) shock occurs when released histamine causes extensive generalized vasodilation?



    D) anaphylactic shock
  21. Venous pooling in a soldier standing at attention for a prolonged time occurs mainly when this mechanism fails.




    B) skeletal muscle pump
  22. The venous return of blood back to the heart is encouraged by



    D) gravity acting on the large veins above the heart.
  23. This vein receives blood returning from all areas of the posterior thoracic wall before it empties into the superior vena cava.




    D) azygos vein
  24. The right gonadal vein empties into the inferior vena cava. Where does the left gonadal vein empty?




    C) the left renal vein
  25. Which of the following is not one of the three major branches arising from the aortic arch?A)brachiocephalic trunk
    B)left common carotid artery
    C)left subclavian artery
    D)right common carotid artery
    D)right common carotid artery
  26. The internal carotid artery contributes blood directly to this circle of Willis artery.




    A) anterior cerebral
  27. Blood flows to the liver from the superior mesenteric vein through the ____ vein.




    B) hepatic portal
  28. Blood flowing from the dural sinus will eventually go through this vein immediately before continuing into the superior vena cava.




    E) brachiocephalic
  29. The right common carotid receives its blood from this artery directly.



    A) brachiocephalic
  30. The artery which is the continuation of the femoral artery after it passes to the posterior side of the thigh is the



    D) popliteal.
Author
studysuccess
ID
315325
Card Set
Ch 20 lec
Description
Ch 20 lec
Updated