Question 1

The relative thickness of vessel walls,from greatest to least,is: artery,vein,capillary.

Accepted Answer

A) True 
 B)False

Question 2

You are examining an animal in lab which you do not recognize immediately,but dissection shows that it has a backbone and a two-chambered heart,so you classify it among the

Accepted Answer

A)   amphibians.
B)   reptiles.
C)   birds.
D)   fish.
E)   mammals.F) A) and E)
G) A) and D)

Question 3

The myocardium is the

Accepted Answer

A)   sac surrounding the heart.
B)   layer of endothelial cells lining the wall of the heart.
C)   artery that carries blood away from the heart.
D)   artery that carries blood to the heart.
E)   thick, muscular layer of the wall of the heart.F) B) and E)
G) A) and E)

Question 4

The tough connective tissue sac surrounding the heart is the

Accepted Answer

A)   myocardium.
B)   epicardium.
C)   peritoneal cavity.
D)   pericardium.
E)   endocardium.F) C) and D)
G) A) and D)

Question 5

The right ventricle sends blood to the systemic circulation.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A)   aneurysm
B)   heart attack due to atherosclerosis
C)   anemia
D)   tachycardia
E)   arrhythmiaF) A) and E)
G) B) and C)

Question 7

If you were watching a blood clot form under a microscope,with platelets aggregating at the clot,you would first have seen the bursting of

Accepted Answer

A)   leukocytes.
B)   erythrocytes.
C)   platelets.
D)   chondrocytes.
E)   osteocytes.F) A) and B)
G) A) and D)

Question 8

The organ of the lymph system in which specialized white blood cells called T cells learn to distinguish body cells from foreign cells is the

Accepted Answer

A)   spleen.
B)   thymus.
C)   tonsil.
D)   lymph node.
E)   heart.F) All of the above
G) A) and C)

Question 9

The right ventricle sends blood to the lungs.

Accepted Answer

A) True 
 B)False

Question 10

At the emergency room where you work,a patient comes in needing rush surgery to repair a large leak of systemically circulated blood from the two vessels that return it to the heart,so you plan to operate on the

Accepted Answer

A)   pulmonary vein and inferior vena cava.
B)   superior vena cava and pulmonary vein.
C)   aorta and inferior vena cava.
D)   inferior vena cava and superior vena cava.
E)   aorta and superior vena cava.F) C) and E)
G) None of the above

Question 11

A heartbeat begins in the

Accepted Answer

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

Question 12

The capillary wall consists only of

Accepted Answer

A)   a single layer of epithelial cells covered by connective tissue.
B)   connective tissue.
C)   a single layer of endothelial cells.
D)   smooth muscle.
E)   a single layer of epithelial cells covered by smooth muscle.F) B) and E)
G) B) and D)

Question 13

Why would icefish lose their alpha and beta globin genes through mutation?

Accepted Answer

A)   If hemoglobin was not necessary, there was no selective pressure to keep mutations from accumulating.
B)   The fish wanted to stop producing red blood cells, so they mutated the globin genes.
C)   Fish with red blood cells absorbed too much heat from sunlight filtering through the ice.
D)   Mistakes in DNA replication are more likely to occur at colder temperatures.
E)   Fish living in the cold cannot obtain enough iron to make hemoglobin.F) A) and B)
G) B) and D)

Question 14

Vertebrates with a three-chambered heart include

Accepted Answer

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

Question 15

Blood clotting is prompted by signals from the central nevous system.

Accepted Answer

A) True 
 B)False

Question 16

Why would exercise immediately help blood circulation in your legs?

Accepted Answer

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

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

The theoretical maximum heart rate for a 20-year-old is 200.

Accepted Answer

A) True 
 B)False

Question 19

The liquid matrix of blood is

Accepted Answer

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

Question 20

You are working on a drug to affect heart function,and your are told to direct the drug to change the relaxation of the ventricles.If your drug is successful,it will alter

Accepted Answer

A)   that the heart is once again beating.
B)   the force of contraction of the atria.
C)   venous pressure.
D)   diastolic pressure.
E)   systolic pressure.F) All of the above
G) A) and B)

Exam 30: The Circulatory System

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

Correct AnswerverifiedShow Answer

The myocardium is the

Correct AnswerverifiedShow Answer

The tough connective tissue sac surrounding the heart is the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The right ventricle sends blood to the lungs.

Correct AnswerverifiedShow Answer

The organ of the lymph system in which specialized white blood cells called T cells learn to distinguish body cells from foreign cells is the

Correct AnswerverifiedShow Answer

The liquid matrix of blood is

Correct AnswerverifiedShow Answer

The theoretical maximum heart rate for a 20-year-old is 200.

Correct AnswerverifiedShow Answer

The capillary wall consists only of

Correct AnswerverifiedShow Answer

A heartbeat begins in the

Correct AnswerverifiedShow Answer

You are examining an animal in lab which you do not recognize immediately,but dissection shows that it has a backbone and a two-chambered heart,so you classify it among the

Correct AnswerverifiedShow Answer

If you were watching a blood clot form under a microscope,with platelets aggregating at the clot,you would first have seen the bursting of

Correct AnswerverifiedShow Answer

Why would icefish lose their alpha and beta globin genes through mutation?

Correct AnswerverifiedShow Answer

Blood clotting is prompted by signals from the central nevous system.

Correct AnswerverifiedShow Answer

The right ventricle sends blood to the systemic circulation.

Correct AnswerverifiedShow Answer

At the emergency room where you work,a patient comes in needing rush surgery to repair a large leak of systemically circulated blood from the two vessels that return it to the heart,so you plan to operate on the

Correct AnswerverifiedShow Answer

You are working on a drug to affect heart function,and your are told to direct the drug to change the relaxation of the ventricles.If your drug is successful,it will alter

Correct AnswerverifiedShow Answer

Why would exercise immediately help blood circulation in your legs?

Correct AnswerverifiedShow Answer

The relative thickness of vessel walls,from greatest to least,is: artery,vein,capillary.

Correct AnswerverifiedShow Answer

Vertebrates with a three-chambered heart include

Correct AnswerverifiedShow Answer

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