Question 1

The ________ carry blood away from the heart.

Accepted Answer

A)   arterioles
B)   arteries
C)   veins
D)   venules
E)   capillariesF) A) and D)
G) D) and E)

Question 2

Thick projections of muscle in the ventricles that anchor chordae tendineae are called

Accepted Answer

A)   pectinate muscles.
B)   conus arteriosus.
C)   papillary muscles.
D)   trabeculae carneae.
E)   auricles.F) A) and B)
G) A) and C)

Question 3

The marginal branch and posterior interventricular branch are branches of the

Accepted Answer

A)   right coronary artery.
B)   left coronary artery.
C)   circumflex artery.
D)   coronary sinus.
E)   aorta.F) C) and D)
G) B) and E)

Question 4

The atrioventricular valves permit blood flow

Accepted Answer

A)   in one direction only.
B)   in both directions.
C)   in many directions.
D)   in opposite directions on the right and left.
E)   from a ventricle to an atrium.F) A) and E)
G) A) and D)

Question 5

An ECG is used to diagnose all of the following conditions except

Accepted Answer

A)   an AV block.
B)   an ectopic pacemaker.
C)   angina pectoris.
D)   premature atrial contractions.
E)   ventricular tachycardia.F) A) and B)
G) C) and D)

Question 6

The ________ is shared by the two ventricles.

Accepted Answer

A)   vena cava
B)   bicuspid valve
C)   chordae tendineae
D)   interventricular septum
E)   trabeculae carneaeF) A) and C)
G) C) and D)

Question 7

Heart rate is controlled by neurons of the cardiovascular center located in the

Accepted Answer

A)   pons.
B)   thalamus.
C)   medulla oblongata.
D)   hypothalamus.
E)   higher centers.F) B) and C)
G) A) and D)

Question 8

The ________ covers the outer surface of the heart.

Accepted Answer

A)   epicardium
B)   myocardium
C)   endocardium
D)   parietal pericardium
E)   mediastinumF) A) and C)
G) B) and E)

Question 9

The heart lies within the ________ cavity.

Accepted Answer

A)   peritoneal
B)   pleural
C)   orbital
D)   dorsal
E)   pericardialF) D) and E)
G) B) and D)

Question 10

Figure 20-2 Cardiac Cycle
 
Use Figure 20-2 to answer the following questions:
-What occurs at the area labeled "C" on the graph?

Accepted Answer

A)   AV valve opens.
B)   AV valve closes.
C)   Ventricular filling begins.
D)   Semilunar valve closes.
E)   Semilunar valve opens.F) All of the above
G) C) and E)

Question 11

A tumor on the adrenal gland increasing catecholamine release will cause all of the following cardiovascular responses except

Accepted Answer

A)   decreased heart rate.
B)   increased contractility.
C)   increased venous return.
D)   increased preload.
E)   decreased ESV.F) A) and B)
G) C) and D)

Question 12

These structures keep the aortic valve cusps from sticking to the wall of the aorta.

Accepted Answer

A)   auricles
B)   chordae tendineae
C)   papillary muscles
D)   pectinate muscles
E)   aortic sinusesF) D) and E)
G) A) and C)

Question 13

If the pacemaker cells in the SA node become more permeable to potassium ions, the

Accepted Answer

A)   heart rate will increase.
B)   heart rate will decrease.
C)   cells will depolarize.
D)   cells will hyperpolarize.
E)   heart rate will decrease and cells will hyperpolarize.F) A) and B)
G) B) and C)

Question 14

In an adult at rest, the end-diastolic volume is typically

Accepted Answer

A)   50 mL.
B)   80 mL.
C)   130 mL.
D)   320 mL.
E)   560 mL.F) A) and E)
G) A) and D)

Question 15

Pacemaker cells isolated from the SA node generate action potentials at ________ beats per minute.

Accepted Answer

A)   20-40
B)   40-60
C)   80-100
D)   100-140
E)   140-180F) B) and D)
G) B) and E)

Question 16

Drugs that block the beta-one adrenergic receptors will

Accepted Answer

A)   increase heart rate.
B)   decrease heart rate.
C)   increase contractility.
D)   increase cardiac output.
E)   decrease the end-systolic volume.F) A) and E)
G) A) and C)

Question 17

A slower-than-normal heart rate is called

Accepted Answer

A)   tachycardia.
B)   bradycardia.
C)   hypercardia.
D)   hypocardia.
E)   procardia.F) B) and D)
G) B) and E)

Question 18

Cardiac muscle layers form this distinct pattern.

Accepted Answer

A)   inner longitudinal layer
B)   outer longitudinal layer
C)   outer circular layer
D)   figure eight
E)   weaveF) C) and E)
G) B) and C)

Question 19

Which of the following describes what is directly measured by an ECG?

Accepted Answer

A)   the force of contractions
B)   blood vessel resistance
C)   end-systolic volume
D)   electrical conduction
E)   neural stimulation of cardiac myocytesF) A) and C)
G) A) and B)

Question 20

Figure 20-2 Cardiac Cycle
 
Use Figure 20-2 to answer the following questions:
-What volume is labeled "E" on the graph?

Accepted Answer

A)   cardiac output
B)   stroke volume
C)   end-diastolic volume
D)   end-systolic volume
E)   total cardiac volumeF) None of the above
G) D) and E)

Exam 20: The Heart

A slower-than-normal heart rate is called

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The ________ is shared by the two ventricles.

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Which of the following describes what is directly measured by an ECG?

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The ________ carry blood away from the heart.

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In an adult at rest, the end-diastolic volume is typically

Correct AnswerverifiedShow Answer

An ECG is used to diagnose all of the following conditions except

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Pacemaker cells isolated from the SA node generate action potentials at ________ beats per minute.

Correct AnswerverifiedShow Answer

A tumor on the adrenal gland increasing catecholamine release will cause all of the following cardiovascular responses except

Correct AnswerverifiedShow Answer

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the area labeled "C" on the graph?

Correct AnswerverifiedShow Answer

Heart rate is controlled by neurons of the cardiovascular center located in the

Correct AnswerverifiedShow Answer

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What volume is labeled "E" on the graph?

Correct AnswerverifiedShow Answer

Thick projections of muscle in the ventricles that anchor chordae tendineae are called

Correct AnswerverifiedShow Answer

If the pacemaker cells in the SA node become more permeable to potassium ions, the

Correct AnswerverifiedShow Answer

These structures keep the aortic valve cusps from sticking to the wall of the aorta.

Correct AnswerverifiedShow Answer

The heart lies within the ________ cavity.

Correct AnswerverifiedShow Answer

The marginal branch and posterior interventricular branch are branches of the

Correct AnswerverifiedShow Answer

Cardiac muscle layers form this distinct pattern.

Correct AnswerverifiedShow Answer

The atrioventricular valves permit blood flow

Correct AnswerverifiedShow Answer

The ________ covers the outer surface of the heart.

Correct AnswerverifiedShow Answer

Drugs that block the beta-one adrenergic receptors will

Correct AnswerverifiedShow Answer

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