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In the fetal heart,the lungs are deflated and the fetus receives oxygen from its mother across the placenta through the umbilical cord.There is an opening in the wall between the left and right side of the fetal heart.This should normally grow closed before birth.What symptoms would be expected if this heart wall opening remained open?


A) It would cause hypertension-fetal blood pressure would be abnormally high.
B) This would balance the diastolic and systolic blood pressure readings.
C) Deoxygenated blood would mix with oxygenated blood and systemic circulation would have too little oxygen to sustain healthy growth.
D) This would not actually cause any bad effects at all since the heart pumping would be equally distributed between left and right ventricles.
E) This would cause blood to flow back out of the heart through the right atrium and cause drastic effects in the fetus.

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

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List the path a drop of blood would go through starting with entry into and eventually leaving the heart to go to the entire body.

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Blood enters the heart through the super...

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Blood traveling from the intestines to the liver is traveling in the


A) pulmonary vein.
B) inferior vena cava.
C) superior vena cava.
D) coronary vessels.
E) hepatic portal vein.

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

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The pacemaker of the heart is termed the


A) AV node.
B) cardiac center in the medulla.
C) SA node.
D) vagus nerve.
E) Purkinje fibers.

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

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Which organ of the body contains very few,if any,capillary beds?


A) the heart
B) the cornea
C) the liver
D) the stomach
E) the skin

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

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A waitress that stands for hours and has a habit of crossing her legs when she sits will increase the chances of having blood accumulate in her


A) arteries.
B) veins.
C) capillaries.
D) left ventricle.
E) right ventricle.

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

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Accumulation of cholesterol beneath the inner linings of arteries is called


A) hypertension.
B) heart attack.
C) stroke.
D) atherosclerosis.
E) thrombus.

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

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Which blood vessel has the highest concentration of carbon dioxide?


A) pulmonary artery
B) pulmonary vein
C) aorta
D) renal vein
E) hepatic portal vein

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

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List the 5 different types of white blood cells found in the human body in order of frequency,with the most common one first.

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Neutrophils are the most common type of ...

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The reason red blood cells only live about 120 days is because red blood cells


A) lack a nucleus and therefore cannot defend themselves from pathogen attack.
B) lack a nucleus and therefore cannot repair and rebuild cell structures.
C) are attacked and eaten by white blood cells.
D) are physiologically inferior cells that are not made to last very long.
E) are destroyed by the high levels of oxygen they carry.

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

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Stem cells


A) are formed from the formed elements in the blood.
B) are found only in bone marrow.
C) are found only in embryos.
D) can differentiate into many cell types, including neurons.
E) will remain as stem cells no matter how many cell divisions take place.

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

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Only blood pressure controls movement of fluid through the capillary wall into the tissue.Therefore,people with high blood pressure often have swelling issues.

A) True
B) False

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How many layers does an arterial wall possess? Which is the thickest?


A) two, the inside layer
B) three, the inside layer
C) two, the outside layer
D) three, the outside layer
E) three, the middle layer

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

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The element in your blood necessary for the clotting process is


A) calcium.
B) phosphorus.
C) chlorine.
D) iron.
E) sodium.

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

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Which blood vessels carry blood away from the heart?


A) capillaries
B) venules
C) veins
D) arteries
E) lymph vessels

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

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Which of the following is true concerning a comparison of arteries and veins?


A) Both are attached to arterioles.
B) Both are attached to venules.
C) Both contain 3 layers in their walls.
D) Both contain valves.
E) Both allow nutrient exchange across their walls.

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

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Which is NOT a correct association describing aspects of the cardiac cycle?


A) Each heartbeat constitutes a cardiac cycle.
B) Diastole is contraction of the heart and systole is relaxation.
C) A normal heart rate varies from 60 to 80 beats per minute.
D) A pulse is the expansion and recoil of artery walls felt near the body surface.
E) Valves prevent backflow of blood into the heart when the heart relaxes.

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

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In humans,the superior vena cava


A) carries blood to the right atrium.
B) carries blood away from the right atrium.
C) joins with the aorta.
D) has a high blood pressure.
E) carries O2-rich blood.

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

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Hemophilia is an inherited clotting disorder found most often in males.

A) True
B) False

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The electrical changes that occur in the heart during contraction are recordings termed


A) EEGs.
B) ECGs.
C) EGGs.
D) EMGs.
E) MIGs.

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

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