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Active hyperemia refers to the normal state of partial contraction in arteriolar smooth muscle.

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Resistance increases when


A) vessel radius decreases
B) vessel length decreases
C) blood viscosity decreases
D) red blood cell count decreases
E) both a and b occurs

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For the following questions, choose the appropriate letter from the answer code below to make the statement true. a.increases b.inhibits or decreases c.has no effect on -Increased arteriolar radius ____ the total peripheral resistance, and increased total peripheral resistance ____ the mean systemic arterial blood pressure.

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Organs that recondition the blood normally receive considerably more of the cardiac output than is necessary to meet their metabolic needs.

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Which is not true about blood pressure?


A) It is maximal during ventricular systole.
B) It decreases as blood moves farther away from the heart.
C) It increases with increasing resistance.
D) It decreases with increasing vessel diameter.
E) It can be increased by direct parasympathetic activity.

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Which type of blood vessel consists of only one cell layer?


A) arteriole
B) artery
C) capillary
D) vein
E) venule

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During strenuous exercise, blood flow increases to


A) the heart because of local control factors
B) the brain because of reflex control factors
C) the skeletal muscles because of local control factors
D) both a and c
E) none of the above; blood flow remains fairly constant to these organs

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   Use this figure to answer the corresponding questions. -Which vessel(s) contains overlapping endothelial cells? a.vessels 1 and 2 b.vessel 2 only c.vessels 2 and 4 d.vessel 4 only e.vessels 2, 3, and 5 Use this figure to answer the corresponding questions. -Which vessel(s) contains overlapping endothelial cells? a.vessels 1 and 2 b.vessel 2 only c.vessels 2 and 4 d.vessel 4 only e.vessels 2, 3, and 5

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Extrinsic control of arteriolar radius is


A) accomplished primarily by the sympathetic nervous system
B) important in the regulation of arterial blood pressure
C) sometimes overridden by local adjustments
D) all of the above
E) only a and b

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Indicate what effect the change in question would have on bulk flow using the answer code below: a.increases ultrafiltration and decreases reabsorption b.decreases ultrafiltration and increases reabsorption c.increases both ultrafiltration and reabsorption d.decreases both ultrafiltration and reabsorption e.would not alter ultrafiltration and reabsorption -Rise in capillary blood pressure in connection with congestive heart failure

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For the following questions, choose the appropriate letter from the answer code below to make the statement true. a.increases b.inhibits or decreases c.has no effect on -Decreased arteriolar radii ____ the blood flow through arterioles.

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Which of the following is the correct relationship between pressure, flow, and resistance?


A)  flow = pressure gradient  radius 4\text { flow } = \frac { \text { pressure gradient } } { \text { radius } ^ { 4 } }
B)  flow × pressure gradient = resistance \text { flow } \times \text { pressure gradient } = \text { resistance }
C)  flow = pressure gradient  resistance \text { flow } = \frac { \text { pressure gradient } } { \text { resistance } }
D)  pressure gradient = flow  resistance \text { pressure gradient } = \frac { \text { flow } } { \text { resistance } }
E)  pressure gradient = flow  radius 4\text { pressure gradient } = \frac { \text { flow } } { \text { radius } ^ { 4 } }

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The average driving force that gets blood into the tissues throughout the cardiac cycle is called the _________________ pressure (not "blood").

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Two functions of arteries include being a(n) _________________ to tissues and a pressure _________________.

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passageway...

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A decrease in blood osmotic pressure will decrease ultrafiltration and increase reabsorption at the capillary level.

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The principle force that causes movement of fluid from the tissues into the capillaries is


A) the hydrostatic pressure of the venous blood
B) the hydrostatic pressure of the arterial blood
C) the osmotic pressure created by the plasma proteins
D) the pressure of the lymph in the tissues around the capillaries
E) none of the above

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Which vessels contain the highest percentage of total blood volume?


A) pulmonary veins
B) pulmonary arteries
C) systemic veins
D) systemic arteries
E) coronary arteries

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Mean arterial blood pressure


A) equals stroke volume times heart rate
B) is 91 mm Hg when the blood pressure is recorded as 117/78
C) is 97.5 mm Hg when the blood pressure is recorded as 117/78
D) is both a and b
E) is both a and c

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Edema, venous pooling, and a reduction in cardiac output are consequences of standing still for a long time.

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Edema refers to excess interstitial fluid.

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