Ch 20 lec

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  1. The smooth muscle in the walls of blood vessels is found in which of the following layers?
    A)tunica adventitia
    B)tunica intima
    C)tunica media
    D)All of the above.
    C)tunica media
    (this multiple choice question has been scrambled)
  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?
    A)1/4
    B)1/2
    C)3/4
    D)1/3
    C)3/4
    (this multiple choice question has been scrambled)
  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
    A)angiotensin II.
    B)high blood carbon dioxide.
    C)high blood oxygen.
    D)histamine.
    D)histamine
    (this multiple choice question has been scrambled)
  5. The most important mechanism of exchange between blood and tissue fluid is ________________.
    A)transcytosis
    B)active transport
    C)diffusion
    D)filtration
    C)diffusion
    (this multiple choice question has been scrambled)
  6. The venous return of blood back to the heart is encouraged by
    A)constriction of veins in the legs.
    B)a drop in internal pressure in the abdomen during inhalation.
    C)relaxation of skeletal muscle.
    D)gravity acting on the large veins above the heart.
    D)gravity acting on the large veins above the heart.
  7. The abdominal aorta terminates by dividing into the
    A)external iliac arteries.
    B)internal iliac arteries.
    C)femoral arteries.
    D)common iliac arteries.
    D)common iliac arteries.
    (this multiple choice question has been scrambled)
  8. Which of the following is not a branch of the abdominal aorta?
    A)celiac artery
    B)renal arteries
    C)common iliac arteries
    D)intercostal arteries
    D)intercostal arteries
    (this multiple choice question has been scrambled)
  9. The right common carotid receives its blood from this artery directly.
    A)brachiocephalic
    B)right cerebral
    C)aorta
    D)right subclavian
    A)brachiocephalic
    (this multiple choice question has been scrambled)
  10. The artery which is the continuation of the femoral artery after it passes to the posterior side of the thigh is the
    A)peroneal.
    B)posterior tibial.
    C)posterior femoral.
    D)popliteal.
    D)popliteal.
    (this multiple choice question has been scrambled)
  11. Blood vessels that connect two capillary networks are called
    A)anastomoses.
    B)portal systems.
    C)capillary plexuses.
    D)veins.
    E)arterial systems.
    B)portal systems
    (this multiple choice question has been scrambled)
  12. The tissue layer of a vessel that differs most in thickness when comparing arteries and veins is the
    A)tunica externa.
    B)tunica adventitia.
    C)tunica interna.
    D)tunica intima.
    E)tunica media.
    E)tunica media.
    (this multiple choice question has been scrambled)
  13. These have the most control of perfusion of a capillary bed.
    A)precapillary sphincters
    B)muscular arteries
    C)elastic arteries
    D)fenestrated capillaries
    E)sinusoids
    A)precapillary sphincters
    (this multiple choice question has been scrambled)
  14. These structures, present in medium-sized veins, prevent backflow of blood.
    A)fenestrations
    B)precapillary sphincters
    C)venous tunica
    D)skeletal muscles
    E)venous valves
    E)venous valves
    (this multiple choice question has been scrambled)
  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)130
    B)120
    C)110
    D)150
    C)110
    (this multiple choice question has been scrambled)
  16. The baroreceptors
    A)transmit signals continually to the brainstem.
    B)increase their signaling rate when the blood pressure rises.
    C)excite the vagal nerves to the heart and dilate the arteries to lower BP.
    D)All of the above.
    D)All of the above.
  17. All of these factors may increase peripheral resistance except
    A)length of vessel.
    B)polycythemia.
    C)radius of vessel.
    D)blood type.
    E)blood viscosity.
    D)blood type.
    (this multiple choice question has been scrambled)
  18. Reduced capillary reabsorption of fluid can lead to edema. Which of the following does not contribute to edema?
    A)liver disease
    B)extreme muscular activity
    C)dietary protein deficiency
    D)kidney diseases
    B)extreme muscular activity
    (this multiple choice question has been scrambled)
  19. The most important mechanism of exchange between blood and tissue fluid is ________________.
    A)active transport
    B)transcytosis
    C)filtration
    D)diffusion
    D)diffusion
    (this multiple choice question has been scrambled)
  20. Which of the following types of low venous return (LVR) shock occurs when released histamine causes extensive generalized vasodilation?
    A)septic shock
    B)neurogenic shock
    C)hypovolemic shock
    D)anaphylactic shock
    D)anaphylactic shock
    (this multiple choice question has been scrambled)
  21. Venous pooling in a soldier standing at attention for a prolonged time occurs mainly when this mechanism fails.
    A)skeletal muscle pump
    B)gravity
    C)cardiac suction
    D)respiratory pump
    E)pressure gradient
    A)skeletal muscle pump
    (this multiple choice question has been scrambled)
  22. The venous return of blood back to the heart is encouraged by
    A)constriction of veins in the legs.
    B)a drop in internal pressure in the abdomen during inhalation.
    C)relaxation of skeletal muscle.
    D)gravity acting on the large veins above the heart.
    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.
    A)azygos vein
    B)hemiazygos vein
    C)right internal jugular vein
    D)right brachiocephalic vein
    E)accessory hemiazygous vein
    A)azygos vein
    (this multiple choice question has been scrambled)
  24. The right gonadal vein empties into the inferior vena cava. Where does the left gonadal vein empty?
    A)It empties into the right gonadal vein before it joins the inferior vena cava.
    B)the left renal vein
    C)It also empties into the inferior vena cava.
    D)the inferior mesenteric vein
    E)the splenic vein
    B)the left renal vein
    (this multiple choice question has been scrambled)
  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)basilar
    B)vertebral
    C)spinal
    D)anterior cerebral
    E)posterior cerebral
    D)anterior cerebral
    (this multiple choice question has been scrambled)
  27. Blood flows to the liver from the superior mesenteric vein through the ____ vein.
    A)celiac
    B)gastroepiploic
    C)hepatic
    D)hepatic portal
    E)jugular
    D)hepatic portal
    (this multiple choice question has been scrambled)
  28. Blood flowing from the dural sinus will eventually go through this vein immediately before continuing into the superior vena cava.
    A)subclavian
    B)brachiocephalic
    C)internal jugular
    D)vertebral
    E)aorta
    B)brachiocephalic
    (this multiple choice question has been scrambled)
  29. The right common carotid receives its blood from this artery directly.
    A)brachiocephalic
    B)aorta
    C)right subclavian
    D)right cerebral
    A)brachiocephalic
    (this multiple choice question has been scrambled)
  30. The artery which is the continuation of the femoral artery after it passes to the posterior side of the thigh is the
    A)popliteal.
    B)peroneal.
    C)posterior tibial.
    D)posterior femoral.
    A)popliteal.
    (this multiple choice question has been scrambled)

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Author:
studysuccess
ID:
315325
Filename:
Ch 20 lec
Updated:
2016-02-04 21:17:46
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20 lec
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Ch 20 lec
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Ch 20 lec
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