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The chambers of the heart that push blood to the lungs or body are the ventricles. 

A) True
B) False

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A decrease in the oxygen-carrying capacity of blood is called anemia.

A) True
B) False

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The signal for the heart to contract begins at the sinoatrial node.

A) True
B) False

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Air moves into the lungs when the air pressure in the lungs is ________ than the air pressure outside of the lungs.This occurs when the muscles of the diaphragm ________.


A) lower; relax
B) lower; contract
C) higher; relax
D) higher; contract

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

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A defibrillator contains two paddles that are placed on a person's chest and through which an electrical shock is administered.What is this procedure treating?


A) aneurysm
B) heart attack due to atherosclerosis
C) anemia
D) tachycardia
E) arrhythmia

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

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The liquid matrix of blood is


A) interstitial fluid.
B) water.
C) cytosol.
D) plasma.
E) lymph.

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

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The scientific name of the "windpipe" is the


A) larynx.
B) pharynx.
C) vocal cords.
D) esophagus.
E) trachea.

F) A) and E)
G) A) and B)

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A valve replacement would prevent the flow of blood from the


A) right atrium to right ventricle.
B) left ventricle to the aorta.
C) inferior vena cava to the right atrium.
D) right ventricle to right atrium.
E) right ventricle to the pulmonary artery.

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

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Why could a human not absorb enough oxygen through the skin,as opposed to creatures like sea anemones?


A) Our surface area to volume ratio is too high for oxygen to reach all tissues.
B) Sea anemones live in water, and there is more oxygen available.
C) Our surface area to volume ratio is too low for oxygen to reach all tissues.
D) Our capillaries do not come close enough to the skin to absorb oxygen.
E) Sea anemones have a larger heart relative to the rest of their body.

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

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Vertebrates with a three-chambered heart include


A) fish.
B) amphibians.
C) birds.
D) mammals.
E) annelids.

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

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In a closed circulatory system,the heart pumps fluid through open-ended vessels into spaces where the fluid bathes the body's cells.

A) True
B) False

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Blood pressure is the force that


A) interstitial fluid exerts on the walls of the arteries.
B) blood exerts on the walls of the ventricles of the heart.
C) blood exerts on the walls of the arteries.
D) interstitial fluid exerts on the walls of the veins.
E) blood exerts on the walls of the atruims of the heart.

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

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If you had a patient with blood improperly draining from all areas above the diaphragm,you would suspect a problem with the 


A) femoral vein.
B) superior vena cava.
C) pulmonary vein.
D) inferior vena cava.
E) jugular vein.

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

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The large vessels of the circulatory system that carry blood away from the heart are


A) veins.
B) capillaries.
C) arteries.
D) lymph vessels.
E) sieve tubes.

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

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A heartbeat begins in the


A) atrioventricular valve.
B) atrioventricular node.
C) sinoatrial node.
D) right ventricle.
E) left atrium.

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

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Blood transports the most carbon dioxide in what form?


A) as bicarbonate ions
B) in red blood cells
C) dissolved in the plasma
D) bound to hemoglobin
E) bound to myoglobin

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

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If a doctor tells you to bring all of the bags with blood components that you can find in the lab refrigerator to the operating room,what would you leave behind?


A) lymph
B) red blood cells
C) white blood cells
D) plasma
E) platelets

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

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The large vessels that carry blood to the heart are


A) arteries.
B) veins.
C) capillaries.
D) lymph vessels.
E) sieve tubes.

F) A) and E)
G) A) and B)

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Patients with cardiovascular problems can be prescribed many different medications. Aspirin inhibits platelets, beta-blockers slow the heart rate, and diuretics cause the kidneys to release more water in the urine. -Which drugs would be prescribed to a person who is at risk of forming a blood clot?


A) a beta-blocker
B) aspirin
C) a diuretic
D) a beta-blocker and a diuretic
E) aspirin and a diuretic

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

Correct Answer

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Why would exercise help your blood circulation in your legs?


A) As muscles contract they squeeze blood through the veins and increased heart rate pushes more blood into the legs.
B) Increased heart rate pushes more blood into the legs only.
C) As muscles contract they squeeze blood through the veins only.
D) Exercise increases the amount of red blood cells only.
E) Exercise increases the amount of red blood cells and increased heart rate pushes more blood into the legs.

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

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