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14 Cards in this Set
- Front
- Back
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Which statement does not accurately describe veins? |
D) is usually innervated by the parasympathetic nervous system
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Smooth muscle in the blood vessel wall:
A) is found primarily in the tunica intima B) is mostly circularly arranged C) is most abundant in veins D) is usually innervated by the parasympathetic nervous system |
B) is mostly circularly arranged
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Peripheral resistance:
A) is inversely proportional to the length of the vascular bed B) increases in anemia C) decreases in polycythemia D) is inversely related to the diameter of the arterioles |
D) is inversely related to the diameter of the arterioles
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Which of the following can lead to decreased venous return of blood to the heart?
A) an increase in blood volume B) an increase in venous pressure C) damage to the venous valves D) increased muscular activity |
C) damage to the venous valves
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Arterial blood pressure increases in response to:
A) increasing stroke volume B) increasing heart rate C) arteriosclerosis D) rising blood volume E) all of these |
E) all of these
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Which of the following would not result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds?
A) a decrease in local tissue O2 content B) an increase in local tissue CO2 C) a local increase in histamine D) a local increase in pH |
D) a local increase in pH
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The structure of a capillary wall differs from that of a vein or an artery because:
A) it has two tunics instead of three B) there is less smooth muscle C) it has a single tunic- only the tunica intima D) none of these |
C) it has a single tunic - only the tunica intima
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The baroreceptors in the carotid sinus and aortic arch are sensitive to:
A) a decrease in CO2 B) changes in arterial pressure C) a decrease in O2 D) all of these |
B) changes in arterial pressure
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The myocardium receives its blood supply directly from the:
A) aorta B) coronary arteries C) coronary sinus D) pulmonary arteries |
B) coronary arteries
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Blood flow in the capillaries is steady despite the rhythmic pumping of the heart because of the:
A) elasticity of the large arteries B) small diameter of capillaries C) thin walls of the veins D) venous valves |
A) elasticity of the large arteries
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Tracing the blood from the heart to the right hand, we find that blood leaves the heart and passes through the aorta, the right subclavian artery, the axillary and bracbial arteries, and through either the radial or ulnar artery to arrive at the hand. Which artery is missing from this sequence?
A) coronary B) brachiocephalic C) cephalic D) right common carotid |
B) brachiocephalic
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Which of the following do not drain directly into the inferior vena cava?
A) inferior phrenic veins B) hepatic veins C) inferior mesenteric vein D) renal veins |
C) inferior mesenteric vein
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In atherosclerosis, which layer of the vessel wall thickens most?
A) tunica media B) tunica intima C) tunica adventitia D) tunica externa |
B) tunica intima
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Suppose that at a given point along a capillary, the following forces exist: capillary hydrostatic pressure (HPc) = 30 mmHg, interstitial fluid hydrostatic pressure (HPif) = 0 mmHg, capillary colloid osmotic pressure (OPc) = 25 mmHG, and interstitial fluid colloid osmotic pressure (OPic) = 2 mmHg. The net filtration pressure at this point in the capillary is:
A) 3 mmHg B) -3 mmHg C) -7 mmHg D) 7 mmHg |
D) 7 mmHg
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