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According to the Laplace's Law, as the diameter of a blood vessel increases, the force applied to the wall of that vessel


A) increases.
B) decreases.
C) increases, then decreases.
D) remains the same.
E) None of these choices is correct.

F) C) and D)
G) B) and E)

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Which of the following functions is associated with vessels that carry blood directly from arterioles to veins without passing through capillaries?


A) thermoregulation
B) nutrient supply to tissues
C) removal of metabolic waste products from tissues
D) oxygen supply to tissues
E) pH regulation

F) All of the above
G) A) and B)

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The central nervous system ischemic response


A) is triggered by an increase in blood flow to the vasomotor center.
B) plays an important role in controlling blood pressure under emergency conditions.
C) is stimulated by a rise in oxygen.
D) is inhibited by a rise in the level of hydrogen ions.
E) plays an important role in regulating blood pressure under normal conditions.

F) B) and E)
G) B) and D)

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Match the term with the best description. -continuous capillaries


A) simple squamous epithelium of capillaries
B) drain capillary networks
C) regulate blood flow into capillaries
D) do not have fenestrae
E) bypass capillary beds

F) C) and D)
G) D) and E)

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Increased pressure in the aortic arch will activate the aortic arch reflex and cause


A) a decrease in the frequency of action potentials from the aortic baroreceptors.
B) increased parasympathetic stimulation of the heart.
C) vasoconstriction of peripheral vessels increasing the blood pressure.
D) increased ADH secretion.
E) increased sympathetic stimulation of the heart.

F) A) and B)
G) A) and C)

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Which of the following veins is NOT involved in draining blood from the arm?


A) brachial vein
B) basilic vein
C) cephalic vein
D) median cubital vein

E) A) and B)
F) A) and C)

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Which of the following is NOT involved in short-term regulation of blood pressure?


A) baroreceptor reflex
B) adrenal medullary mechanism
C) alteration in blood volume
D) chemoreceptor mechanism

E) C) and D)
F) A) and B)

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The abdominal aorta divides at L5 to form the two


A) inferior mesenteric arteries.
B) common iliac arteries.
C) superior mesenteric arteries.
D) femoral arteries.
E) renal arteries.

F) A) and E)
G) None of the above

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Resistance in the cardiovascular system


A) tends to increase if blood viscosity increases.
B) tends to decrease as the diameter of blood vessels decreases.
C) dramatically increases blood flow through the circulatory system.
D) is directly related to flow ( \uparrow R \rightarrow \uparrow Flow) .
E) does not occur. If it did, blood would not circulate in the blood vessels.

F) A) and B)
G) C) and D)

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Resistance to blood flow is greatest in


A) arteries.
B) arterioles.
C) venules.
D) veins.
E) capillaries.

F) A) and C)
G) All of the above

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The kidneys are supplied by the


A) renal arteries.
B) suprarenal arteries.
C) lumbar arteries.
D) inferior mesenteric arteries.

E) B) and C)
F) A) and D)

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Which of the following arteries branches directly from the aortic arch?


A) brachiocephalic artery
B) coronary artery
C) pulmonary artery
D) right subclavian artery
E) right common carotid artery

F) A) and D)
G) B) and C)

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The pelvic area is supplied with blood from the _______ arteries.

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Art is 75. He has advanced arteriosclerosis. He is suffering from a number of manifestations, which are consistent with his arteriosclerosis. Over the past several years he has developed hypertension and he is beginning to show signs of renal failure. Which of the following are consistent with his condition?


A) increased resistance to blood flow
B) increased renin secretion from the kidneys
C) increased aldosterone secretion from the adrenal cortex
D) increased angiotensinogen formation
E) All of these choices is correct.

F) A) and D)
G) C) and E)

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Sympathetic nerve fibers that innervate blood vessel walls are found primarily in the


A) tunica intima.
B) tunica media.
C) tunica adventitia.
D) tunica externa.
E) tunica interna.

F) D) and E)
G) A) and E)

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Match the term with the best description. -a characteristic of aging arteries


A) arteriosclerosis
B) produced by turbulent blood flow
C) blood flow is directly proportional to pressure differences and inversely proportional to resistance
D) as pressure in a vessel decreases, the force holding it open decreases, and the vessel tends to collapse
E) a characteristic of the venous system

F) D) and E)
G) A) and C)

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  -The figure illustrates the capillary network. What does  E  represent? A)  precapillary sphincter B)  metarteriole C)  thoroughfare channel D)  arterial capillaries E)  venous capillaries -The figure illustrates the capillary network. What does "E" represent?


A) precapillary sphincter
B) metarteriole
C) thoroughfare channel
D) arterial capillaries
E) venous capillaries

F) C) and D)
G) A) and E)

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Fill in the missing blood vessel. vertebral artery; _____________; posterior cerebral artery

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Use the following key to choose the most correct answer. -(1) blood pressure in the aorta; (2) blood pressure in the superior vena cava


A) Choose this if the first item is greater than the second item.
B) Choose this if the first item is less than the second item.
C) Choose this if the first item is equal or nearly equal to the second item.

D) A) and B)
E) All of the above

Correct Answer

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Which of the following would occur as a person goes into shock?


A) Baroreceptors are stimulated.
B) Chemoreceptors are depressed.
C) Renin release is inhibited.
D) Parasympathetic stimulation is increased.
E) Sympathetic stimulation is decreased.

F) A) and D)
G) A) and B)

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