Question 1

When is coronary blood flow greatest?

Accepted Answer

A) During ventricular contraction 
B) Immediately following the QRS complex on the ECG 
C) During myocardial relaxation 
D) During myocardial contraction 
A) During ventricular contraction 
B) Immediately following the QRS complex on the ECG 
C) During myocardial relaxation 
D) During myocardial contraction

Question 2

Which of the following is most true of S₁?

Accepted Answer

A) Also known as dupp 
B) Indicative of gallop rhythm 
C) Occurs during the beginning of ventricular systole with the closure of the tricuspid and mitral valves 
D) It is the heart sound caused by the rapid movement of the action potential along the His-Purkinje system. 
A) Also known as dupp 
B) Indicative of gallop rhythm 
C) Occurs during the beginning of ventricular systole with the closure of the tricuspid and mitral valves 
D) It is the heart sound caused by the rapid movement of the action potential along the His-Purkinje system.

Question 3

An accumulation of excess fluid in the pericardial space

Accepted Answer

A) causes external compression of the heart. 
B) depresses the SA node,thereby eliminating pacemaker activity. 
C) causes valvular stenosis. 
D) causes a left-to-right shunt. 
A) causes external compression of the heart. 
B) depresses the SA node,thereby eliminating pacemaker activity. 
C) causes valvular stenosis. 
D) causes a left-to-right shunt.

Question 4

Which of the following is least true of S₂?

Accepted Answer

A) Also known as dupp 
B) Heart sound 
C) Indicative of a gallop rhythm 
D) Heard at the beginning of ventricular relaxation (diastole) 
A) Also known as dupp 
B) Heart sound 
C) Indicative of a gallop rhythm 
D) Heard at the beginning of ventricular relaxation (diastole)

Question 5

Which of the following structures receives unoxygenated blood?

Accepted Answer

A) Aorta 
B) Left ventricle 
C) Pulmonary artery 
D) Pulmonary veins 
A) Aorta 
B) Left ventricle 
C) Pulmonary artery 
D) Pulmonary veins

Question 6

Referring to the ECG,the QRS complex represents ventricular

Accepted Answer

A) contraction. 
B) repolarization. 
C) relaxation. 
D) depolarization. 
A) contraction. 
B) repolarization. 
C) relaxation. 
D) depolarization.

Question 7

The semilunar valves

Accepted Answer

A) receive blood from the contracting ventricles. 
B) are anchored by chordae tendineae. 
C) "see" only oxygenated blood. 
D) "see" only unoxygenated blood. 
A) receive blood from the contracting ventricles. 
B) are anchored by chordae tendineae. 
C) "see" only oxygenated blood. 
D) "see" only unoxygenated blood.

Question 8

During ventricular filling,the

Accepted Answer

A) semilunar valves are open. 
B) AV valves are closed. 
C) QRS complex is "happening." 
D) ventricles are relaxed. 
A) semilunar valves are open. 
B) AV valves are closed. 
C) QRS complex is "happening." 
D) ventricles are relaxed.

Question 9

Which of the following is not part of coronary circulation?

Accepted Answer

A) Left anterior descending artery 
B) Circumflex artery 
C) Pulmonary veins 
D) Posterior descending artery 
A) Left anterior descending artery 
B) Circumflex artery 
C) Pulmonary veins 
D) Posterior descending artery

Question 10

During ventricular contraction,the

Accepted Answer

A) AV valves close in response to intraventricular pressure. 
B) ECG is displaying the T wave. 
C) semilunar valves close,causing S₁. 
D) ECG is displaying the P-R interval. 
A) AV valves close in response to intraventricular pressure. 
B) ECG is displaying the T wave. 
C) semilunar valves close,causing S₁. 
D) ECG is displaying the P-R interval.

Question 11

Which of the following best describes the heart as a double pump?

Accepted Answer

A) Atria and ventricles 
B) Right and left 
C) AV and semilunar 
D) Interatrial septum,interventricular septum 
A) Atria and ventricles 
B) Right and left 
C) AV and semilunar 
D) Interatrial septum,interventricular septum

Question 12

Heart rate is slowest if the pacemaker activity signal originates in the

Accepted Answer

A) SA node. 
B) AV node. 
C) normal pacemaker of the heart. 
D) ventricular pacemaker cells. 
A) SA node. 
B) AV node. 
C) normal pacemaker of the heart. 
D) ventricular pacemaker cells.

Question 13

What event causes the pulmonic valve to open?

Accepted Answer

A) The P wave 
B) An increase in the pressure within the right ventricle 
C) "Lubb-dupp" 
D) Contraction of the chordae tendineae 
A) The P wave 
B) An increase in the pressure within the right ventricle 
C) "Lubb-dupp" 
D) Contraction of the chordae tendineae

Question 14

With which of the following are these words most related: electrical signal,action potential,cardiac impulse,and nerve impulse?

Accepted Answer

A) Tricuspid and mitral atrioventricular valves 
B) Aortic and pulmonic semilunar valves 
C) Depolarization and repolarization 
D) Contraction and relaxation 
A) Tricuspid and mitral atrioventricular valves 
B) Aortic and pulmonic semilunar valves 
C) Depolarization and repolarization 
D) Contraction and relaxation

Question 15

A signal is generated by the SA node and is regularly discharged to the rest of the conduction system.Which of the following best describes this activity?

Accepted Answer

A) Contraction and relaxation 
B) Automaticity and rhythmicity 
C) Sinoatrial node and atrioventricular node 
D) Lubb dupp 
A) Contraction and relaxation 
B) Automaticity and rhythmicity 
C) Sinoatrial node and atrioventricular node 
D) Lubb dupp

Question 16

Blood flows from the right atrium through which atrioventricular valve to the right ventricle?

Accepted Answer

A) Bicuspid 
B) Mitral 
C) Pulmonic 
D) Tricuspid 
A) Bicuspid 
B) Mitral 
C) Pulmonic 
D) Tricuspid

Question 17

Which layer of the heart also lines the valves and is continuous with blood vessels?

Accepted Answer

A) Myocardium 
B) Endocardium 
C) Epicardium 
D) Pericardium 
A) Myocardium 
B) Endocardium 
C) Epicardium 
D) Pericardium

Question 18

Under what condition is blood most likely to flow "backward" (e.g. ,from the left ventricle back into the left atrium)?

Accepted Answer

A) Pulmonary artery hypertension 
B) Left ventricular hypertrophy 
C) An insufficient mitral valve 
D) Pulmonary edema 
A) Pulmonary artery hypertension 
B) Left ventricular hypertrophy 
C) An insufficient mitral valve 
D) Pulmonary edema

Question 19

The right ventricle pumps blood to the

Accepted Answer

A) right atrium. 
B) pulmonary veins. 
C) pulmonary artery. 
D) aorta. 
A) right atrium. 
B) pulmonary veins. 
C) pulmonary artery. 
D) aorta.

Question 20

Which structure "sees" oxygenated blood?

Accepted Answer

A) Tricuspid valve 
B) Pulmonary artery 
C) Pulmonary veins 
D) Right semilunar valve 
A) Tricuspid valve 
B) Pulmonary artery 
C) Pulmonary veins 
D) Right semilunar valve

Exam 16: Anatomy of the Heart

When is coronary blood flow greatest?

Which of the following is most true of S₁?

An accumulation of excess fluid in the pericardial space

Which of the following is least true of S₂?

Which of the following structures receives unoxygenated blood?

Referring to the ECG,the QRS complex represents ventricular

The semilunar valves

During ventricular filling,the

Which of the following is not part of coronary circulation?

During ventricular contraction,the

Which of the following best describes the heart as a double pump?

Heart rate is slowest if the pacemaker activity signal originates in the

What event causes the pulmonic valve to open?

With which of the following are these words most related: electrical signal,action potential,cardiac impulse,and nerve impulse?

A signal is generated by the SA node and is regularly discharged to the rest of the conduction system.Which of the following best describes this activity?

Blood flows from the right atrium through which atrioventricular valve to the right ventricle?

Which layer of the heart also lines the valves and is continuous with blood vessels?

Under what condition is blood most likely to flow "backward" (e.g. ,from the left ventricle back into the left atrium)?

The right ventricle pumps blood to the

Which structure "sees" oxygenated blood?

Introduction to the Human Body

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Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

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Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

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Blood

Function of the Heart

Anatomy of the Blood Vessels and Special Circulations

Functions of the Blood Vessels

Lymphatic System

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Water, Electrolyte, and Acidbase Balance

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