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Circulation is vital because it


A) supplies oxygen and nutrients to and removes wastes from tissues.
B) inflates the lungs.
C) delivers carbon dioxide to tissues and removes excess oxygen.
D) delivers wastes to tissues.

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

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Cardiac output is calculated by multiplying the stroke volume by the systolic blood pressure.

A) True
B) False

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The systemic circuit


A) sends oxygen-poor blood to the heart.
B) brings oxygen-rich blood from the tissues.
C) brings oxygen-poor blood from the lungs.
D) sends oxygen-rich blood to the tissues.

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

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Blood flow through a capillary is controlled by a precapillary sphincter,which opens or closes due to the requirements of the cells the capillary supplies.

A) True
B) False

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Kidney disease can cause hypertension by


A) activating the renin-angiotensin mechanism.
B) stimulating the secretion of aldosterone.
C) increasing retention of sodium and water.
D) all of the above.

E) All of the above
F) B) and C)

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Histamine increases capillary membrane permeability,which can result in an edematous and painful condition.

A) True
B) False

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In an ECG pattern,the P wave is caused by


A) repolarization of atrial muscle fibers.
B) repolarization of ventricular muscle fibers.
C) depolarization of atrial muscle fibers.
D) depolarization of ventricular muscle fibers.

E) None of the above
F) All of the above

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Bruce has colorectal cancer that has spread to his lymphatic system.He is given a drug that is an angiogenesis inhibitor.The drug works by


A) stimulating new blood vessels to serve tissue damaged by the cancer.
B) starving tumors by cutting off their blood supplies.
C) halting cell division only in tumor cells.
D) cutting off the supply of ATP to cancer cells.

E) None of the above
F) B) and C)

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A left ventricular assist device


A) is routinely used in people who have had heart attacks.
B) can substitute for the atria.
C) can maintain cardiac function until a donor heart becomes available.
D) is an implantable replacement heart.

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

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Which artery is incorrectly matched to its location?


A) Inferior mesenteric artery;colon and rectum
B) Thyrocervical arteries;thymus.
C) Celiac arteries;liver,spleen,and upper gastrointestinal tract
D) Popliteal;behind the knee

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

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Impulses that the vagus nerve carries to the heart


A) are parasympathetic and increase heart rate.
B) are parasympathetic and decrease heart rate.
C) are sympathetic and increase heart rate.
D) are sympathetic and decrease heart rate.

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

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The pain of angina pectoris comes from a blockage in an artery that supplies the


A) left arm and shoulder.
B) neck and jaw.
C) heart.
D) sternum.

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

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Plasma proteins in capillaries help to


A) maintain the osmotic pressure of the blood.
B) decrease the osmotic pressure of the blood.
C) maintain the hydrostatic pressure of the blood.
D) decrease the hydrostatic pressure of the blooD.

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

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Metarterioles connect arterioles and venules,and allow blood to bypass the capillaries.

A) True
B) False

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When smooth muscles in the walls of the arteries are stimulated to contract


A) peripheral resistance decreases.
B) viscosity increases.
C) blood pressure decreases.
D) blood pressure increases.

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

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Which of the following is not a normal response to physical exercise?


A) Increased heart rate
B) Increased ventricular contraction
C) Increased blood flow to the skeletal muscles
D) Increased blood flow to the abdominal viscera

E) None of the above
F) B) and C)

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Which of the following is due to an aging cardiovascular system?


A) The tunica interna thickens.
B) The direction of blood flow in some capillaries reverses.
C) Arteries become less rigid.
D) Veins lose collagen.

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

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The apical heartbeat is heard by listening between the fifth and sixth ribs about 7.5 cm left of the midline.

A) True
B) False

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Which type of blood vessel holds the greatest volume of blood?


A) Artery
B) Arteriole
C) Capillary
D) Vein

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

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The aorta is the largest artery in the pulmonary circuit.

A) True
B) False

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