Question 1

The correct sequence of parts that carry cardiac impulses is

Accepted Answer

A)  AV node,SA node,Purkinje fibers,AV bundle
B)  AV node,AV bundle,Purkinje fibers,SA node
C)  SA node,Purkinje fibers,AV node,AV bundle
D)  SA node,AV node,AV bundle,Purkinje fibersE) B) and D)
F) A) and B)

Question 2

Which of the following is true about the heart?

Accepted Answer

A)  The apex end points downward at about the 5th intercostal space.
B)  The heart is located lateral to the lungs.
C)  The average adult heart is about 8 cm long and 5 cm wide.
D)  The base of the heart lies beneath the fourth rib.E) A) and C)
F) None of the above

Question 3

Small areas of the myocardium contracting chaotically is called

Accepted Answer

A)  flutter.
B)  fibrillation.
C)  bradycardia.
D)  tachycardia.E) B) and D)
F) A) and B)

Question 4

A person warming up after being cold feels a warm rush as blood flows quickly to the peripheral appendages.Nitric oxide is important in this situation because it

Accepted Answer

A)  raises blood pressure.
B)  raises blood temperature.
C)  relaxes the smooth muscle in the blood vessel wall.
D)  enhances gas exchange.E) A) and C)
F) A) and B)

Question 5

Osmotic pressure forces molecules in the blood out through capillary walls.

Accepted Answer

A) True 
 B)False

Question 6

Angiotensin II increases blood pressure by

Accepted Answer

A)  increasing peripheral resistance.
B)  releasing renin.
C)  inhibiting the release of aldosterone.
D)  promoting the excretion of sodium.E) C) and D)
F) A) and C)

Question 7

Which of the following is not a factor that increases risk of developing atherosclerosis?

Accepted Answer

A)  A diet high in unsaturated fats
B)  Tobacco smoking
C)  Lack of physical exercise
D)  Low blood pressureE) All of the above
F) None of the above

Question 8

The normal pacemaker of the heart is the

Accepted Answer

A)  Purkinje fibers.
B)  AV bundle.
C)  sinoatrial node.
D)  atrioventricular node.E) A) and D)
F) C) and D)

Question 9

Which of the following is the correct sequence of parts through which blood moves from the vena cava to the lungs?

Accepted Answer

A)  Right atrium,pulmonary valve,right ventricle,tricuspid valve
B)  Right atrium,tricuspid valve,right ventricle,pulmonary valve
C)  Right ventricle,tricuspid valve,right atrium,pulmonary valve
D)  Right ventricle,pulmonary valve,right atrium,tricuspid valve,right ventricleE) A) and C)
F) A) and D)

Question 10

The mechanism that ensures the volume of blood discharged from the heart is equal to the volume entering its chambers is ______ law of the heart.

Accepted Answer

A)  Boyle's
B)  Frank-Starling's
C)  Dalton's
D)  Newton'sE) None of the above
F) A) and D)

Question 11

In mitral valve prolapse,the mitral valve

Accepted Answer

A)  is missing as a result of abnormal development.
B)  has an extra cusp.
C)  bulges into the left atrium during ventricular relaxation.
D)  bulges into the left atrium during ventricular contraction.E) C) and D)
F) B) and C)

Question 12

Arteries are strong,elastic vessels that carry blood to the heart.

Accepted Answer

A) True 
 B)False

Question 13

Central venous pressure is the pressure in the inferior vena cava at the central point of the abdomen.

Accepted Answer

A) True 
 B)False

Question 14

Factors that increase heart rate and blood pressure include

Accepted Answer

A)  emotional responses.
B)  exercise.
C)  increase in body temperature.
D)  all of the above.E) All of the above
F) A) and B)

Question 15

Marjorie suffers from phlebitis.She has

Accepted Answer

A)  inflammation of her veins.
B)  too much phlegm in her throat.
C)  extra capillaries in her legs.
D)  inflammation of her arteries.E) B) and C)
F) A) and B)

Question 16

The right atrium receives blood directly from

Accepted Answer

A)  the superior vena cava and inferior vena cava only.
B)  the superior vena cava,inferior vena cava,and coronary sinus.
C)  the superior vena cava,inferior vena cava,and pulmonary veins.
D)  the pulmonary veins.E) A) and B)
F) All of the above

Question 17

The coronary sinus drains blood from the wall of the heart into the left atrium.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following correctly matches the valve to its function?

Accepted Answer

A)  Tricuspid valve-permits one-way blood flow from the right to the left atrium
B)  Pulmonary valve-permits one-way blood flow from the left ventricle to the aorta
C)  Mitral valve-permits one-way blood flow from the left atrium to the left ventricle
D)  Aortic valve-permits one-way blood flow from the right ventricle to the pulmonary trunkE) B) and D)
F) None of the above

Question 19

In an ECG pattern,the T wave is caused by

Accepted Answer

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

Question 20

Capillary walls consist of a single layer of epithelial cells and they exchange substances in the blood for substances in the tissue fluid surrounding body cells.

Accepted Answer

A) True 
 B)False

Exam 15: Cardiovascular System

Small areas of the myocardium contracting chaotically is called

Correct AnswerverifiedShow Answer

The normal pacemaker of the heart is the

Correct AnswerverifiedShow Answer

Which of the following is true about the heart?

Correct AnswerverifiedShow Answer

Angiotensin II increases blood pressure by

Correct AnswerverifiedShow Answer

A person warming up after being cold feels a warm rush as blood flows quickly to the peripheral appendages.Nitric oxide is important in this situation because it

Correct AnswerverifiedShow Answer

Capillary walls consist of a single layer of epithelial cells and they exchange substances in the blood for substances in the tissue fluid surrounding body cells.

Correct AnswerverifiedShow Answer

Factors that increase heart rate and blood pressure include

Correct AnswerverifiedShow Answer

In mitral valve prolapse,the mitral valve

Correct AnswerverifiedShow Answer

In an ECG pattern,the T wave is caused by

Correct AnswerverifiedShow Answer

Which of the following is the correct sequence of parts through which blood moves from the vena cava to the lungs?

Correct AnswerverifiedShow Answer

Osmotic pressure forces molecules in the blood out through capillary walls.

Correct AnswerverifiedShow Answer

The mechanism that ensures the volume of blood discharged from the heart is equal to the volume entering its chambers is ______ law of the heart.

Correct AnswerverifiedShow Answer

Marjorie suffers from phlebitis.She has

Correct AnswerverifiedShow Answer

The coronary sinus drains blood from the wall of the heart into the left atrium.

Correct AnswerverifiedShow Answer

Arteries are strong,elastic vessels that carry blood to the heart.

Correct AnswerverifiedShow Answer

Central venous pressure is the pressure in the inferior vena cava at the central point of the abdomen.

Correct AnswerverifiedShow Answer

Which of the following correctly matches the valve to its function?

Correct AnswerverifiedShow Answer

Which of the following is not a factor that increases risk of developing atherosclerosis?

Correct AnswerverifiedShow Answer

The right atrium receives blood directly from

Correct AnswerverifiedShow Answer

The correct sequence of parts that carry cardiac impulses is

Correct AnswerverifiedShow Answer

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