Question 1

Which of the following is least descriptive of the myocardium?

Accepted Answer

A)  cardiac muscle,composed of actin and myosin arranged in sarcomeres 
B)  thicker in the ventricles than the atria 
C)  thicker in the left ventricle than the right ventricle 
D)  thicker in the left atrium than the right ventricle 
A)  cardiac muscle,composed of actin and myosin arranged in sarcomeres 
B)  thicker in the ventricles than the atria 
C)  thicker in the left ventricle than the right ventricle 
D)  thicker in the left atrium than the right ventricle

Question 2

Which of the following is a result of ventricular contraction?

Accepted Answer

A)  The AV valves open. 
B)  The semilunar valves close. 
C)  Blood is pumped into the pulmonary artery and the aorta. 
D)  Blood flows back into the atria. 
A)  The AV valves open. 
B)  The semilunar valves close. 
C)  Blood is pumped into the pulmonary artery and the aorta. 
D)  Blood flows back into the atria.

Question 3

Complete the sequence: blood flows from the pulmonary capillaries to the pulmonary veins to the left atrium to the left ventricle to the

Accepted Answer

A)  vena cava. 
B)  pulmonary artery. 
C)  aorta. 
D)  circle of Willis. 
A)  vena cava. 
B)  pulmonary artery. 
C)  aorta. 
D)  circle of Willis.

Question 4

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

Question 5

These conducting fibers rapidly spread the electrical signal throughout the ventricles.

Accepted Answer

A)  bundle of His 
B)  Purkinje fibers 
C)  SA node 
D)  AV node 
A)  bundle of His 
B)  Purkinje fibers 
C)  SA node 
D)  AV node

Question 6

The pacemaker of the heart is located in the upper wall of the

Accepted Answer

A)  right atrium. 
B)  right ventricle. 
C)  left atrium. 
D)  left ventricle. 
A)  right atrium. 
B)  right ventricle. 
C)  left atrium. 
D)  left ventricle.

Question 7

Blood flows from the right atrium through this 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 8

Complete the sequence: blood flows from the right atrium to the right ventricle to the pulmonary artery to the

Accepted Answer

A)  pulmonary veins. 
B)  coronary arteries. 
C)  pulmonary capillaries. 
D)  vena cava. 
A)  pulmonary veins. 
B)  coronary arteries. 
C)  pulmonary capillaries. 
D)  vena cava.

Question 9

Which of the following is true of the structures of the electrical conduction system?

Accepted Answer

A)  The AV valve is the pacemaker. 
B)  In normal sinus rhythm,the electrical signal arises within the SA node. 
C)  The His-Purkinje system spreads the electrical system from the right atrium to the left atrium. 
D)  The purpose of the AV node is to increase the speed at which the cardiac impulse	moves from the atria to the ventricles. 
A)  The AV valve is the pacemaker. 
B)  In normal sinus rhythm,the electrical signal arises within the SA node. 
C)  The His-Purkinje system spreads the electrical system from the right atrium to the left atrium. 
D)  The purpose of the AV node is to increase the speed at which the cardiac impulse	moves from the atria to the ventricles.

Question 10

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 11

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 12

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 13

Which of the following must precede ventricular contraction?

Accepted Answer

A)  ventricular relaxation 
B)  "lubb-dupp" 
C)  ventricular depolarization 
D)  closing of the AV valves 
A)  ventricular relaxation 
B)  "lubb-dupp" 
C)  ventricular depolarization 
D)  closing of the AV valves

Question 14

What is the name of the valve that prevents backflow of blood into the right atrium when the right ventricle contracts?

Accepted Answer

A)  mitral valve 
B)  pulmonic valve 
C)  semilunar valve 
D)  tricuspid valve 
A)  mitral valve 
B)  pulmonic valve 
C)  semilunar valve 
D)  tricuspid valve

Question 15

The aorta receives blood from the

Accepted Answer

A)  right ventricle. 
B)  pulmonary veins. 
C)  pulmonary artery. 
D)  left ventricle. 
A)  right ventricle. 
B)  pulmonary veins. 
C)  pulmonary artery. 
D)  left ventricle.

Question 16

The purpose of this structure is to momentarily delay the spread of the signal from the atrium to the ventricles.

Accepted Answer

A)  SA node 
B)  Purkinje fibers 
C)  bundle of His 
D)  AV node 
A)  SA node 
B)  Purkinje fibers 
C)  bundle of His 
D)  AV node

Question 17

The mitral and the bicuspid valves

Accepted Answer

A)  are semilunar valves. 
B)  are both located on the right side of the heart. 
C)  "see" only unoxygenated blood. 
D)  are the same valves. 
A)  are semilunar valves. 
B)  are both located on the right side of the heart. 
C)  "see" only unoxygenated blood. 
D)  are the same valves.

Question 18

The Purkinje fibers

Accepted Answer

A)  open valves. 
B)  pull on the cusps of the valves. 
C)  conduct electrical signals throughout the ventricles. 
D)  close valves. 
A)  open valves. 
B)  pull on the cusps of the valves. 
C)  conduct electrical signals throughout the ventricles. 
D)  close valves.

Question 19

Which cavity first receives unoxygenated blood from the vena cava?

Accepted Answer

A)  right ventricle 
B)  left atrium 
C)  left ventricle 
D)  right atrium 
A)  right ventricle 
B)  left atrium 
C)  left ventricle 
D)  right atrium

Question 20

Vessel(s)that carry(ies)blood from the pulmonary capillaries to the left atrium.

Accepted Answer

A)  aorta 
B)  pulmonary artery 
C)  pulmonary veins 
D)  vena cava 
A)  aorta 
B)  pulmonary artery 
C)  pulmonary veins 
D)  vena cava

Exam 16: Heart

Which of the following is least descriptive of the myocardium?

Which of the following is a result of ventricular contraction?

Complete the sequence: blood flows from the pulmonary capillaries to the pulmonary veins to the left atrium to the left ventricle to the

Which structure "sees" oxygenated blood?

These conducting fibers rapidly spread the electrical signal throughout the ventricles.

The pacemaker of the heart is located in the upper wall of the

Blood flows from the right atrium through this atrioventricular valve to the right ventricle.

Complete the sequence: blood flows from the right atrium to the right ventricle to the pulmonary artery to the

Which of the following is true of the structures of the electrical conduction system?

What event causes the pulmonic valve to open?

An accumulation of excess fluid in the pericardial space

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

Which of the following must precede ventricular contraction?

What is the name of the valve that prevents backflow of blood into the right atrium when the right ventricle contracts?

The aorta receives blood from the

The purpose of this structure is to momentarily delay the spread of the signal from the atrium to the ventricles.

The mitral and the bicuspid valves

The Purkinje fibers

Which cavity first receives unoxygenated blood from the vena cava?

Vessel(s)that carry(ies)blood from the pulmonary capillaries to the left atrium.

Introduction to the Human Body

Basic Chemistry

Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

Skeletal System

Muscular System

Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

Sensory System

Endocrine System

Blood

Function of the Heart

Anatomy of the Blood Vessels

Functions of the Blood Vessels

Lymphatic System

Immune System

Respiratory System

Digestive System

Urinary System

Water,Electrolyte,and Acid-Base Balance

Reproductive Systems

Human Development and Heredity

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