Question 1

What 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 2

What are the conducting fibers that 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 3

Which of the following is most descriptive of the tricuspid valve?

Accepted Answer

A) "Sees" oxygenated blood 
B) Entrance valve: right ventricle 
C) Exit valve: right ventricle 
D) Semilunar valve 
A) "Sees" oxygenated blood 
B) Entrance valve: right ventricle 
C) Exit valve: right ventricle 
D) Semilunar valve

Question 4

Which of the following is true about the left ventricular myocardium?

Accepted Answer

A) Pumps blood into the pulmonary artery 
B) Contraction pumps blood into the aorta 
C) Receives oxygenated blood from the precordium 
D) Contains unoxygenated blood 
A) Pumps blood into the pulmonary artery 
B) Contraction pumps blood into the aorta 
C) Receives oxygenated blood from the precordium 
D) Contains unoxygenated blood

Question 5

Cells that spontaneously depolarize from resting membrane potential to threshold potential

Accepted Answer

A) are called pacemaker cells. 
B) normally "live" within the chordae tendineae. 
C) are restricted to the SA node. 
D) are stored within the pericardium. 
A) are called pacemaker cells. 
B) normally "live" within the chordae tendineae. 
C) are restricted to the SA node. 
D) are stored within the pericardium.

Question 6

Referring to the ECG,the P wave represents

Accepted Answer

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

Question 7

What is the valvular response to the contraction of the ventricles?

Accepted Answer

A) The AV valves open. 
B) The semilunar valves close. 
C) The pulmonic and aortic valves open. 
D) The entrance valves open. 
A) The AV valves open. 
B) The semilunar valves close. 
C) The pulmonic and aortic valves open. 
D) The entrance valves open.

Question 8

In which structure is the oxygen saturation highest?

Accepted Answer

A) Pulmonary veins 
B) Venae cavae 
C) Right ventricle 
D) Pulmonary artery 
A) Pulmonary veins 
B) Venae cavae 
C) Right ventricle 
D) Pulmonary artery

Question 9

Which 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 10

The correct sequence is: 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 11

Describe the valvular response to the relaxation of the right ventricle.

Accepted Answer

A) The tricuspid valve opens 
B) The right AV valve snaps closed 
C) The pulmonic valve opens 
D) The semilunar valve in the right heart opens 
A) The tricuspid valve opens 
B) The right AV valve snaps closed 
C) The pulmonic valve opens 
D) The semilunar valve in the right heart opens

Question 12

Under what condition will the AV node become the pacemaker?

Accepted Answer

A) When its rate of spontaneous depolarization exceeds that of the ventricular conduction cells 
B) As a normal response to sympathetic nerve discharge 
C) When its rate of spontaneous depolarization exceeds that of the SA node 
D) In the presence of normal sinus rhythm 
A) When its rate of spontaneous depolarization exceeds that of the ventricular conduction cells 
B) As a normal response to sympathetic nerve discharge 
C) When its rate of spontaneous depolarization exceeds that of the SA node 
D) In the presence of normal sinus rhythm

Question 13

The heart

Accepted Answer

A) lies within the mediastinal and thoracic cavities. 
B) beats only in response to stimulation by the autonomic nerves. 
C) is located within the pleural cavity. 
D) is located between the fifth and twelfth ribs in the left thoracic region. 
A) lies within the mediastinal and thoracic cavities. 
B) beats only in response to stimulation by the autonomic nerves. 
C) is located within the pleural cavity. 
D) is located between the fifth and twelfth ribs in the left thoracic region.

Question 14

Which group is incorrect?

Accepted Answer

A) Semilunar valves: pulmonic,aortic 
B) Atrioventricular valves: tricuspid,bicuspid,mitral 
C) Structures that carry oxygenated blood: pulmonary veins,left ventricle,aorta 
D) Structures that carry unoxygenated blood: right ventricle,venae cavae,pulmonary veins 
A) Semilunar valves: pulmonic,aortic 
B) Atrioventricular valves: tricuspid,bicuspid,mitral 
C) Structures that carry oxygenated blood: pulmonary veins,left ventricle,aorta 
D) Structures that carry unoxygenated blood: right ventricle,venae cavae,pulmonary veins

Question 15

Which of the following is true of the aorta?

Accepted Answer

A) It distributes unoxygenated blood to the systemic circulation. 
B) It distributes oxygenated blood to the pulmonic circulation. 
C) It arises within the left ventricle. 
D) It is color coded blue to indicate its degree of oxygen saturation. 
A) It distributes unoxygenated blood to the systemic circulation. 
B) It distributes oxygenated blood to the pulmonic circulation. 
C) It arises within the left ventricle. 
D) It is color coded blue to indicate its degree of oxygen saturation.

Question 16

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 17

Which of the following is part of the blood flow through the heart?

Accepted Answer

A) Left atrium 
B) Left anterior descending artery 
C) Circumflex artery 
D) Right coronary artery 
A) Left atrium 
B) Left anterior descending artery 
C) Circumflex artery 
D) Right coronary artery

Question 18

Which of the following is responsible for the opening and closing of the heart valves?

Accepted Answer

A) Pressure exerted on the valves as the heart contracts and relaxes 
B) Electrical signals arising in the SA node 
C) The degree of oxygen concentration of blood in the ventricles 
D) The amount of blood in the heart 
A) Pressure exerted on the valves as the heart contracts and relaxes 
B) Electrical signals arising in the SA node 
C) The degree of oxygen concentration of blood in the ventricles 
D) The amount of blood in the heart

Question 19

A hole in the interventricular septum causes

Accepted Answer

A) blood to shunt from left atrium to the right atrium. 
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) blood to shunt from left atrium to the right atrium. 
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 20

In which structure is oxygen saturation lowest?

Accepted Answer

A) Right atrium 
B) Pulmonary capillaries 
C) Pulmonary veins 
D) Left ventricle 
A) Right atrium 
B) Pulmonary capillaries 
C) Pulmonary veins 
D) Left ventricle

Exam 16: Anatomy of the Heart

What is the hardest working cardiac chamber and therefore has the thickest myocardium?

What are the conducting fibers that rapidly spread the electrical signal throughout the ventricles?

Which of the following is most descriptive of the tricuspid valve?

Which of the following is true about the left ventricular myocardium?

Cells that spontaneously depolarize from resting membrane potential to threshold potential

Referring to the ECG,the P wave represents

What is the valvular response to the contraction of the ventricles?

In which structure is the oxygen saturation highest?

Which structure connects the cusps of the AV valves to the ventricles?

The correct sequence is: Blood flows from the pulmonary capillaries to the pulmonary veins to the left atrium to the left ventricle to the

Describe the valvular response to the relaxation of the right ventricle.

Under what condition will the AV node become the pacemaker?

The heart

Which group is incorrect?

Which of the following is true of the aorta?

The pulmonic and aortic valves

Which of the following is part of the blood flow through the heart?

Which of the following is responsible for the opening and closing of the heart valves?

A hole in the interventricular septum causes

In which structure is oxygen saturation lowest?

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 and Special Circulations

Functions of the Blood Vessels

Lymphatic System

Immune System

Respiratory System

Digestive System

Urinary System

Water, Electrolyte, and Acidbase Balance

Reproductive Systems

Human Development and Heredity

Filters