Question 1

Referring to the ECG,the QRS complex represents

Accepted Answer

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

Question 2

All of the following are electrical terms except

Accepted Answer

A)  sarcomere. 
B)  depolarization. 
C)  action potential. 
D)  repolarization. 
A)  sarcomere. 
B)  depolarization. 
C)  action potential. 
D)  repolarization. A

Question 3

Which layer of the heart has actin,myosin,and intercalated discs?

Accepted Answer

A)  myocardium 
B)  endocardium 
C)  epicardium 
D)  pericardium 
A)  myocardium 
B)  endocardium 
C)  epicardium 
D)  pericardium A

Question 4

The atrioventricular node (AV node)

Accepted Answer

A)  is the pacemaker of the heart. 
B)  is located in the upper part of the right atrium. 
C)  has a rate that is normally faster than the SA node. 
D)  delays the electrical signal coming from the atria into the ventricles. 
A)  is the pacemaker of the heart. 
B)  is located in the upper part of the right atrium. 
C)  has a rate that is normally faster than the SA node. 
D)  delays the electrical signal coming from the atria into the ventricles.

Question 5

This is the hardest working cardiac chamber and therefore has the thickest myocardium.

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 6

This layer of the heart allows it to act as a pump.

Accepted Answer

A)  epicardium 
B)  myocardium 
C)  pericardium 
D)  endocardium 
A)  epicardium 
B)  myocardium 
C)  pericardium 
D)  endocardium

Question 7

Which of the following is not true of the heart?

Accepted Answer

A)  The heart is located within the mediastinum. 
B)  The apex is located left of the sternal midline at the level of the fifth intercostal space. 
C)  The base of the heart is located at the level of the second rib. 
D)  The pericardium is composed of actin and myosin. 
A)  The heart is located within the mediastinum. 
B)  The apex is located left of the sternal midline at the level of the fifth intercostal space. 
C)  The base of the heart is located at the level of the second rib. 
D)  The pericardium is composed of actin and myosin.

Question 8

Which of the following structures "sees" 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 9

Where does the cardiac action potential (cardiac impulse)normally originate?

Accepted Answer

A)  AV node 
B)  Purkinje fibers 
C)  ectopic focus 
D)  SA node 
A)  AV node 
B)  Purkinje fibers 
C)  ectopic focus 
D)  SA node

Question 10

The pericardium is a part of the

Accepted Answer

A)  myocardium. 
B)  diaphragm. 
C)  epicardium. 
D)  endocardium. 
A)  myocardium. 
B)  diaphragm. 
C)  epicardium. 
D)  endocardium.

Question 11

A hole in the interventricular septum causes

Accepted Answer

A)  a right-to-left shunt. 
B)  extreme cyanosis. 
C)  blood to shunt from the left ventricle to the right ventricle. 
D)  blood to shunt from the left ventricle to the pulmonary artery. 
A)  a right-to-left shunt. 
B)  extreme cyanosis. 
C)  blood to shunt from the left ventricle to the right ventricle. 
D)  blood to shunt from the left ventricle to the pulmonary artery.

Question 12

The pulmonic and aortic valves

Accepted Answer

A)  are atrioventricular valves. 
B)  "see" only oxygenated blood. 
C)  are attached to the ventricular walls by chordae tendineae. 
D)  are semilunar valves. 
A)  are atrioventricular valves. 
B)  "see" only oxygenated blood. 
C)  are attached to the ventricular walls by chordae tendineae. 
D)  are semilunar valves.

Question 13

Which of the following semilunar valves "sees" oxygenated blood?

Accepted Answer

A)  mitral 
B)  bicuspid 
C)  aortic 
D)  pulmonic 
A)  mitral 
B)  bicuspid 
C)  aortic 
D)  pulmonic

Question 14

Which of the following is least related to the mitral valve?

Accepted Answer

A)  left heart 
B)  bicuspid 
C)  semilunar 
D)  chordae tendineae 
A)  left heart 
B)  bicuspid 
C)  semilunar 
D)  chordae tendineae

Question 15

Chordae tendineae are not associated with this valve.

Accepted Answer

A)  aortic 
B)  mitral 
C)  tricuspid 
D)  bicuspid 
A)  aortic 
B)  mitral 
C)  tricuspid 
D)  bicuspid

Question 16

This sling-like structure supports the heart.

Accepted Answer

A)  pericardium 
B)  chordae tendineae 
C)  myocardium 
D)  endocardium 
A)  pericardium 
B)  chordae tendineae 
C)  myocardium 
D)  endocardium

Question 17

Which group is incorrect?

Accepted Answer

A)  semilunar valves:pulmonic,aortic 
B)  structures that carry oxygenated blood:pulmonary veins,left ventricle,aorta 
C)  layers of the heart:epicardium,myocardium,endocardium 
D)  abnormal heart rates:tachycardia,bradycardia,normal sinus rhythm 
A)  semilunar valves:pulmonic,aortic 
B)  structures that carry oxygenated blood:pulmonary veins,left ventricle,aorta 
C)  layers of the heart:epicardium,myocardium,endocardium 
D)  abnormal heart rates:tachycardia,bradycardia,normal sinus rhythm

Question 18

Which group is incorrect?

Accepted Answer

A)  atrioventricular valves:tricuspid,bicuspid,mitral 
B)  layers of the heart:epicardium,myocardium,endocardium 
C)  abnormal heart rates:tachycardia,bradycardia 
D)  parts of the conduction system:SA node,AV node,bundle of His,Purkinje fibers,medulla oblongata 
A)  atrioventricular valves:tricuspid,bicuspid,mitral 
B)  layers of the heart:epicardium,myocardium,endocardium 
C)  abnormal heart rates:tachycardia,bradycardia 
D)  parts of the conduction system:SA node,AV node,bundle of His,Purkinje fibers,medulla oblongata

Question 19

This structure connects the cusps of the AV valves to the ventricles.

Accepted Answer

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

Question 20

Which of the following is least true of the aortic valve?

Accepted Answer

A)  It is also called the left semilunar valve. 
B)  It "sees" oxygenated blood. 
C)  Blood flows from the ventricle through this valve into the pulmonary artery. 
D)  An incompetent aortic valve allows blood to leak from the aorta back into the left ventricle. 
A)  It is also called the left semilunar valve. 
B)  It "sees" oxygenated blood. 
C)  Blood flows from the ventricle through this valve into the pulmonary artery. 
D)  An incompetent aortic valve allows blood to leak from the aorta back into the left ventricle.

Exam 16: Heart

Referring to the ECG,the QRS complex represents

All of the following are electrical terms except

Which layer of the heart has actin,myosin,and intercalated discs?

The atrioventricular node (AV node)

This is the hardest working cardiac chamber and therefore has the thickest myocardium.

This layer of the heart allows it to act as a pump.

Which of the following is not true of the heart?

Which of the following structures "sees" unoxygenated blood?

Where does the cardiac action potential (cardiac impulse)normally originate?

The pericardium is a part of the

A hole in the interventricular septum causes

The pulmonic and aortic valves

Which of the following semilunar valves "sees" oxygenated blood?

Which of the following is least related to the mitral valve?

Chordae tendineae are not associated with this valve.

This sling-like structure supports the heart.

Which group is incorrect?

Which group is incorrect?

This structure connects the cusps of the AV valves to the ventricles.

Which of the following is least true of the aortic valve?

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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