Question 1

The meshwork that forms the fabric of a blood clot mostly consists of

Accepted Answer

A)  fibrinogen.
B)  fibrin.
C)  thrombin.
D)  prothrombin.
E)  collagen.F) A) and C)
G) B) and D)

Question 2

Essentially all exchange of gases and other materials between the circulatory system and tissues of the body or the outside world (e.g. ,in the lungs) occurs in the

Accepted Answer

A)  capillaries.
B)  arteries.
C)  veins.
D)  heart.
E)  lymphatic system.F) All of the above
G) D) and E)

Question 3

Which structure prevents blood flowing back into the heart from the aorta between heartbeats?

Accepted Answer

A)  semilunar valve
B)  atrioventricular valve
C)  tricuspid valve
D)  mitral valve
E)  ductus arteriosusF) C) and E)
G) A) and B)

Question 4

The "QRS" complex visible in a normal electrocardiogram is associated with the

Accepted Answer

A)  excitation from the AV node and depolarization of the ventricles.
B)  excitation from the SA node and depolarization of the atria.
C)  excitation from the SA node and repolarization of the ventricles.
D)  excitation from the AV node and repolarization of the atria.
E)  activity in the vagus nerve and release of acetylcholinE.F) B) and C)
G) C) and D)

Question 5

Fluid that collects in tissues is returned to the bloodstream by the

Accepted Answer

A)  excretory system.
B)  digestive system.
C)  lymphatic system.
D)  vascular system.
E)  endocrine system.F) A) and E)
G) D) and E)

Question 6

The sinoatrial node consists of a form of this tissue.

Accepted Answer

A)  nervous
B)  muscular
C)  epithelial
D)  connective
E)  adiposeF) C) and E)
G) C) and D)

Question 7

You expect to find the lowest overall blood pressure in

Accepted Answer

A)  humans.
B)  sparrows.
C)  alligators.
D)  ostrich.
E)  salmon.F) C) and E)
G) A) and D)

Question 8

Standing still and at attention for long periods can result in inadequate venous return.The effects of this can be seen when even young and healthy soldiers sometimes faint when standing at attention for long periods.Which of the following is NOT occurring to promote return of blood from the venous system in this situation?

Accepted Answer

A)  sympathetic activation of smooth muscle in large veins
B)  skeletal muscle activity compressing veins and forcing blood flow
C)  one way flow in the venous system due to valves
D)  ventricular contractionE) None of the above
F) All of the above

Question 9

In general,the vessels that carry blood away from the heart in a closed circulatory system are referred to as

Accepted Answer

A)  arteries.
B)  veins.
C)  capillaries.
D)  sinuses.
E)  auxiliary hearts.F) B) and E)
G) B) and D) A

Question 10

When compared to the pressure of blood leaving the left ventricle,the pressure of blood leaving the right ventricle is

Accepted Answer

A)  greater.
B)  less.
C)  not different.D) A) and C)
E) B) and C) B

Question 11

Imagine a red blood cell leaving the right ventricle of your heart.To which chamber of the heart will that cell return first?

Accepted Answer

A)  right atrium
B)  right ventricle
C)  left atrium
D)  left ventricle
E)  impossible to say from information givenF) A) and D)
G) B) and D)

Question 12

Animal groups differ in the mechanisms by which heartbeats are initiated.Most arthropods have a

Accepted Answer

A)  neurogenic heart while vertebrates have a myogenic heart.
B)  myogenic heart while vertebrates have a neurogenic heart.
C)  neurogenic heart while vertebrates have a cardiogenic heart.
D)  cardiogenic heart while vertebrates have a myogenic heart.
E)  autonomous heart while vertebrates have a neurally controlled heart.F) A) and B)
G) B) and D)

Question 13

While shopping at your local drugstore,you stop at the blood pressure machine.It measures your blood pressure as 115/75 (good-that's healthy!) .This number means that

Accepted Answer

A)  arterial pressure is 115 mm Hg when the ventricles contract and 75 mm Hg in between ventricular contractions.
B)  arterial pressure is 75 mm Hg when the ventricles contract and 115 mm Hg in between ventricular contractions.
C)  arterial pressure is 115 mm Hg when the atria contract and 75 mm Hg in between atrial contractions.
D)  your sinoatrial node generates a 115 mV signal and your atrioventricular node generates a 75 mV signal.
E)  your sinoatrial node generates a 75 mV signal and your atrioventricular node amplifies this to a 75 mV signal.F) A) and E)
G) B) and D) A

Question 14

The pulmonary vein carries blood that is rich in oxygen back to the heart.Is there anything unexpected about the name of this vein?

Accepted Answer

A)  There is nothing unexpected about the name of this vein.
B)  Veins usually carry blood that has been depleted of oxygen.
C)  Pulmonary refers to veins that carry blood to the lungs.
D)  Veins usually carry blood away from the heart.E) None of the above
F) A) and D)

Question 15

Frogs have two atria,but only a single ventricle.

Accepted Answer

A) True 
 B)False

Question 16

Rises in blood pressure with large increases in cardiac output are limited by decreases in total peripheral resistance.

Accepted Answer

A) True 
 B)False

Question 17

The electrical stimulus for each human heartbeat begins in the

Accepted Answer

A)  right atrium at the sinoatrial node.
B)  left atrium at the sinoatrial node.
C)  right atrium at the atrioventricular node.
D)  right ventricle at the atrioventricular node.
E)  pulmonary trunk at the sinoatrial nodE.F) A) and C)
G) None of the above

Question 18

To form a blood clot,a series of plasma proteins must activate in a given sequence.If DNA info for one such protein mutates such that the resulting protein is nonfunctional,predict the consequence.

Accepted Answer

A)  It depends on which protein is affected.
B)  Regardless of the protein involved,the clot would not form.C) A) and B)
D) undefined

Question 19

Place the events of a cardiac cycle in order, starting with the return of deoxygenated blood to the heart.

Accepted Answer

A)  The blood returns from the body to the right atrium. 
B)  The blood is directed to the left atrium. 
C)  The blood flows into the right ventricle. 
D)  The blood is routed to the body via the aorta. 
E)  The blood flows into the pulmonary vein. F) The blood flows into the pulmonary artery. G) The blood flows into the left ventricle. H) The blood is sent to the lungs to pick up oxygen. I) A) and B)
J) G) and H)

Question 20

Imagine that a section of heart muscle no longer has gap junctions.What do you think would be the result?

Accepted Answer

A)  The effects would be minimal from this change.
B)  The ability of the heart muscle cells to contract would be severely compromised.
C)  The ability of the heart muscle cells to reproduce would be severely compromised.
D)  The ability of the heart muscle cells to coordinate their contractions would be severely compromiseD.E) B) and C)
F) C) and D)

Exam 36: Circulatory Systems

The meshwork that forms the fabric of a blood clot mostly consists of

Correct Answer
verified

Essentially all exchange of gases and other materials between the circulatory system and tissues of the body or the outside world (e.g. ,in the lungs) occurs in the

Correct Answer
verified

Which structure prevents blood flowing back into the heart from the aorta between heartbeats?

Correct Answer
verified

The "QRS" complex visible in a normal electrocardiogram is associated with the

Correct Answer
verified

Fluid that collects in tissues is returned to the bloodstream by the

Correct Answer
verified

The sinoatrial node consists of a form of this tissue.

Correct Answer
verified

You expect to find the lowest overall blood pressure in

Correct Answer
verified

Correct Answer
verified

In general,the vessels that carry blood away from the heart in a closed circulatory system are referred to as

Correct Answer
verified
A

When compared to the pressure of blood leaving the left ventricle,the pressure of blood leaving the right ventricle is

Correct Answer
verified
B

Imagine a red blood cell leaving the right ventricle of your heart.To which chamber of the heart will that cell return first?

Correct Answer
verified

Animal groups differ in the mechanisms by which heartbeats are initiated.Most arthropods have a

Correct Answer
verified

While shopping at your local drugstore,you stop at the blood pressure machine.It measures your blood pressure as 115/75 (good-that's healthy!) .This number means that

Correct Answer
verified
A

The pulmonary vein carries blood that is rich in oxygen back to the heart.Is there anything unexpected about the name of this vein?

Correct Answer
verified

Frogs have two atria,but only a single ventricle.

Correct Answer
verified

Rises in blood pressure with large increases in cardiac output are limited by decreases in total peripheral resistance.

Correct Answer
verified

The electrical stimulus for each human heartbeat begins in the

Correct Answer
verified

To form a blood clot,a series of plasma proteins must activate in a given sequence.If DNA info for one such protein mutates such that the resulting protein is nonfunctional,predict the consequence.

Correct Answer
verified

Place the events of a cardiac cycle in order, starting with the return of deoxygenated blood to the heart.

Correct Answer
verified

Imagine that a section of heart muscle no longer has gap junctions.What do you think would be the result?

Correct Answer
verified

Exam 36: Circulatory Systems

The meshwork that forms the fabric of a blood clot mostly consists of

Correct AnswerverifiedShow Answer

Essentially all exchange of gases and other materials between the circulatory system and tissues of the body or the outside world (e.g. ,in the lungs) occurs in the

Correct AnswerverifiedShow Answer

Which structure prevents blood flowing back into the heart from the aorta between heartbeats?

Correct AnswerverifiedShow Answer

The "QRS" complex visible in a normal electrocardiogram is associated with the

Correct AnswerverifiedShow Answer

Fluid that collects in tissues is returned to the bloodstream by the

Correct AnswerverifiedShow Answer

The sinoatrial node consists of a form of this tissue.

Correct AnswerverifiedShow Answer

You expect to find the lowest overall blood pressure in

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In general,the vessels that carry blood away from the heart in a closed circulatory system are referred to as

Correct AnswerverifiedA

When compared to the pressure of blood leaving the left ventricle,the pressure of blood leaving the right ventricle is

Correct AnswerverifiedB

Imagine a red blood cell leaving the right ventricle of your heart.To which chamber of the heart will that cell return first?

Correct AnswerverifiedShow Answer

Animal groups differ in the mechanisms by which heartbeats are initiated.Most arthropods have a

Correct AnswerverifiedShow Answer

While shopping at your local drugstore,you stop at the blood pressure machine.It measures your blood pressure as 115/75 (good-that's healthy!) .This number means that

Correct AnswerverifiedA

The pulmonary vein carries blood that is rich in oxygen back to the heart.Is there anything unexpected about the name of this vein?

Correct AnswerverifiedShow Answer

Frogs have two atria,but only a single ventricle.

Correct AnswerverifiedShow Answer

Rises in blood pressure with large increases in cardiac output are limited by decreases in total peripheral resistance.

Correct AnswerverifiedShow Answer

The electrical stimulus for each human heartbeat begins in the

Correct AnswerverifiedShow Answer

To form a blood clot,a series of plasma proteins must activate in a given sequence.If DNA info for one such protein mutates such that the resulting protein is nonfunctional,predict the consequence.

Correct AnswerverifiedShow Answer

Place the events of a cardiac cycle in order, starting with the return of deoxygenated blood to the heart.

Correct AnswerverifiedShow Answer

Imagine that a section of heart muscle no longer has gap junctions.What do you think would be the result?

Correct AnswerverifiedShow Answer

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A

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B

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A

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