Question 1

Which of the following pairs is mismatched?

Accepted Answer

A)   endocardium - covers the inner surfaces of the heart
B)   myocardium - cardiac muscle
C)   trabeculae carneae - interior walls of ventricles
D)   pectinate muscles - muscles that close valves
E)   chordae tendineae - connective tissue strings that connect to cusps of valves

Question 2

In the cardiac cycle,

Accepted Answer

A)   the right atrium and the right ventricle contract simultaneously.
B)   the left atrium contracts before the right atrium.
C)   all four chambers of the heart contract at the same time.
D)   all four chambers of the heart are in diastole at the same time.

Question 3

The delivery of oxygen and nutrients to the tissues of the body is accomplished through ________ circulation.

Accepted Answer

A)   hepatic
B)   pulmonary
C)   peripheral
D)   systemic

Question 4

The right atrium receives blood from

Accepted Answer

A)   the lungs and the heart.
B)   the heart.
C)   the body and the heart.
D)   the lungs and the body.

Question 5

The period of isovolumetric contraction is immediately followed by

Accepted Answer

A)   the period of ejection.
B)   AV node depolarization.
C)   passive ventricular filling.
D)   atrial contraction.
E)   isovolumetric relaxation.

Question 6

Chemoreceptors sensitive to blood oxygen levels are primarily located in the

Accepted Answer

A)   medulla oblongata.
B)   carotid arteries.
C)   right atrium.
D)   left ventricle.
E)   jugular veins.

Question 7

In the cardiac cycle,

Accepted Answer

A)   the right atrium and the right ventricle contract simultaneously.
B)   the two atria relax while the two ventricles contract.
C)   the left atrium contracts before the right atrium.
D)   all four chambers of the heart contract at the same time.
E)   all four chambers of the heart are in systole at the same time.

Question 8

If the SA node is nonfunctional, which of the following is most likely to occur?

Accepted Answer

A)   The heart will go into asystole (stop) .
B)   Tachycardia will develop.
C)   Another portion of the heart will become the pacemaker.
D)   The heart will go into defibrillation.
E)   The heart will be desensitized.

Question 9

All of the following cardiac measurements will increase during exercise except ____________________.

Accepted Answer

A)   end-diastolic volume
B)   end-systolic volume
C)   stroke volume
D)   cardiac output

Question 10

Concerning heart sounds, which of the following is correct?

Accepted Answer

A)   The first heart sound occurs at the beginning of ventricular systole.
B)   The second heart sound is heard when the AV valves are closing.
C)   The first heart sound is the sound of the semilunar valves closing.
D)   The second heart sound occurs when blood flows into the superior vena cava.
E)   The first heart sound occurs at the beginning of ventricular diastole.

Question 11

The heart

Accepted Answer

A)   is a four-chambered muscular pump.
B)   is posterior to the trachea.
C)   is lined with an epithelial layer called epicardium.
D)   lies mostly to the right of the midline of the sternum.
E)   has a superior apex and an inferior base.

Question 12

An incompetent pulmonary semilunar valve could result in less blood reaching the

Accepted Answer

A)   lungs.
B)   heart muscle.
C)   right ventricle.
D)   aorta.
E)   right atrium.

Question 13

Angina pectoris is chest pain caused by reduced

Accepted Answer

A)   stimulation of the myocardium.
B)   blood supply to cardiac muscle.
C)   fluid in the pericardial sac.
D)   contractility of the heart.
E)   action potentials from SA node.

Question 14

Occlusion of which of the following would primarily damage the posterior wall of the heart?

Accepted Answer

A)   circumflex artery
B)   pulmonary artery
C)   right marginal artery
D)   coronary sinus artery
E)   right coronary artery

Question 15

What event(s)  occur during the QRS complex of an ECG?

Accepted Answer

A)   depolarization of the atria
B)   repolarization of the ventricles
C)   depolarization of the atria and repolarization of the ventricles
D)   depolarization of the ventricles and repolarization of the atria

Question 16

The cardioregulatory center of the brain is located in the

Accepted Answer

A)   hypothalamus.
B)   medulla oblongata.
C)   cerebellum.
D)   cerebrum.
E)   diencephalons.

Question 17

All of the following structural changes found in the heart occur with the normal aging process, except ___________________.

Accepted Answer

A)   hypertrophy of the left ventricle
B)   decreased elasticity of large vessels
C)   decreased valve flexibility
D)   increased elasticity of large vessels
E)   atrophy of conduction cells

Question 18

Contraction of the ventricles is referred to as ventricular

Accepted Answer

A)   systole.
B)   diastole.
C)   fibrillation.
D)   ischemia.
E)   depolarization.

Question 19

If cardiac muscle cells are unable to repolarize, this would cause

Accepted Answer

A)   cardiac output to increase.
B)   no harm. These cells can spontaneously depolarize anyway.
C)   the heart rate to decrease. It might cause cardiac arrest.
D)   an increased demand on mitochondria to produce more ATP.
E)   tachycardia.

Question 20

Contraction of the papillary muscles would

Accepted Answer

A)   eject blood from the ventricles.
B)   prevent the AV valves from protruding into the atria.
C)   close the semilunar valves.
D)   cause the atria to eject their contents into the ventricles.
E)   open the semilunar valves.

Exam 20: Cardiovascular System: the Heart

The period of isovolumetric contraction is immediately followed by

Correct AnswerverifiedShow Answer

The delivery of oxygen and nutrients to the tissues of the body is accomplished through ________ circulation.

Correct AnswerverifiedShow Answer

Chemoreceptors sensitive to blood oxygen levels are primarily located in the

Correct AnswerverifiedShow Answer

Angina pectoris is chest pain caused by reduced

Correct AnswerverifiedShow Answer

The heart

Correct AnswerverifiedShow Answer

The right atrium receives blood from

Correct AnswerverifiedShow Answer

An incompetent pulmonary semilunar valve could result in less blood reaching the

Correct AnswerverifiedShow Answer

What event(s) occur during the QRS complex of an ECG?

Correct AnswerverifiedShow Answer

If the SA node is nonfunctional, which of the following is most likely to occur?

Correct AnswerverifiedShow Answer

In the cardiac cycle,

Correct AnswerverifiedShow Answer

If cardiac muscle cells are unable to repolarize, this would cause

Correct AnswerverifiedShow Answer

Which of the following pairs is mismatched?

Correct AnswerverifiedShow Answer

Occlusion of which of the following would primarily damage the posterior wall of the heart?

Correct AnswerverifiedShow Answer

In the cardiac cycle,

Correct AnswerverifiedShow Answer

The cardioregulatory center of the brain is located in the

Correct AnswerverifiedShow Answer

Concerning heart sounds, which of the following is correct?

Correct AnswerverifiedShow Answer

All of the following structural changes found in the heart occur with the normal aging process, except ___________________.

Correct AnswerverifiedShow Answer

Contraction of the papillary muscles would

Correct AnswerverifiedShow Answer

Contraction of the ventricles is referred to as ventricular

Correct AnswerverifiedShow Answer

All of the following cardiac measurements will increase during exercise except ____________________.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified