Question 1

The heart is posterior to the sternum.

Accepted Answer

A) True 
 B)False

Question 2

Indicate which factor involved in the initiation and spread of cardiac excitation is being identified by using the answer code (options may be used more than once or not at all):
-the normal pacemaker of the heart

Accepted Answer

A) SA node 
B) AV node 
C) bundle of His and Purkinje system 
D) gap junctions 
A) SA node 
B) AV node 
C) bundle of His and Purkinje system 
D) gap junctions

Question 3

Indicate which pressure relationship exists during the time in question by using the answer code (options may be used more than once or not at all):
-when ventricular ejection is occurring

Accepted Answer

A) aortic pressure > ventricular pressure > atrial pressure 
B) ventricular pressure > aortic pressure > atrial pressure 
C) aortic pressure > atrial pressure > ventricular pressure 
D) ventricular pressure > atrial pressure > aortic pressure 
E) atrial pressure > ventricular pressure > aortic pressure 
A) aortic pressure > ventricular pressure > atrial pressure 
B) ventricular pressure > aortic pressure > atrial pressure 
C) aortic pressure > atrial pressure > ventricular pressure 
D) ventricular pressure > atrial pressure > aortic pressure 
E) atrial pressure > ventricular pressure > aortic pressure

Question 4

What is the low-resistance pathway that permits electrical activity pass from cell to cell in myocardial tissue?

Accepted Answer

A)  desmosome 
B)  septum 
C)  gap junction 
D)  T-tubule 
A)  desmosome 
B)  septum 
C)  gap junction 
D)  T-tubule

Question 5

The electrocardiogram is most useful in determining which component of cardiac output?

Accepted Answer

A)  stroke volume 
B)  heart rate 
C)  ejection fraction 
D)  end-diastolic volume 
A)  stroke volume 
B)  heart rate 
C)  ejection fraction 
D)  end-diastolic volume

Question 6

The AV and semilunar valves are never open at the same time.

Accepted Answer

A) True 
 B)False

Question 7

Match heart characteristic with correct anatomical structure by using the answer code (options may be used more than once or not at all):
-its cells have slow Ca²⁺ channels

Accepted Answer

A) tricuspid valve 
B) myocardium 
C) aortic semilunar valve 
D) AV node 
E) sinoatrial node 
A) tricuspid valve 
B) myocardium 
C) aortic semilunar valve 
D) AV node 
E) sinoatrial node

Question 8

Indicate the effects of sympathetic and parasympathetic stimulation on the heart by using the answer code (options may be used more than once or not at all):
-increases the contractility of the atrial and ventricular muscle

Accepted Answer

A) effect caused by sympathetic stimulation 
B) effect caused by parasympathetic stimulation 
C) not brought about by either sympathetic or parasympathetic stimulation 
A) effect caused by sympathetic stimulation 
B) effect caused by parasympathetic stimulation 
C) not brought about by either sympathetic or parasympathetic stimulation

Question 9

Indicate which factor involved in the initiation and spread of cardiac excitation is being identified by using the answer code (options may be used more than once or not at all):
-rapidly conducts the impulse down the ventricular septum and throughout much of the ventricular musculature

Accepted Answer

A) SA node 
B) AV node 
C) bundle of His and Purkinje system 
D) gap junctions 
A) SA node 
B) AV node 
C) bundle of His and Purkinje system 
D) gap junctions

Question 10

An increase in cardiac sympathetic activity ____________________ the rate of depolarization of the SA node.

Accepted Answer

The answer of An increase in cardiac sympathetic activity ____________________...

Question 11

Indicate the effects of sympathetic and parasympathetic stimulation on the heart by using the answer code (options may be used more than once or not at all):
-increases the AV nodal delay

Accepted Answer

A) effect caused by sympathetic stimulation 
B) effect caused by parasympathetic stimulation 
C) not brought about by either sympathetic or parasympathetic stimulation 
A) effect caused by sympathetic stimulation 
B) effect caused by parasympathetic stimulation 
C) not brought about by either sympathetic or parasympathetic stimulation

Question 12

What normally carries out the fastest rate of autorhythmicity?

Accepted Answer

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

Question 13

Arteries carry blood toward the ventricles.

Accepted Answer

A) True 
 B)False

Question 14

Which statement concerning the AV nodal delay is correct?

Accepted Answer

A)  It ensures that the atria contract and empty their contents into the ventricles prior to ventricular systole. 
B)  It ensures that the ventricles contract prior to atrial systole. 
C)  It ensures that tetanic contraction of cardiac muscle is impossible. 
D)  It is shortened by parasympathetic stimulation. 
A)  It ensures that the atria contract and empty their contents into the ventricles prior to ventricular systole. 
B)  It ensures that the ventricles contract prior to atrial systole. 
C)  It ensures that tetanic contraction of cardiac muscle is impossible. 
D)  It is shortened by parasympathetic stimulation.

Question 15

The ECG is an actual recording of cardiac electrical activity.

Accepted Answer

A) True 
 B)False

Question 16

Which statement is correct for the systemic circulation?

Accepted Answer

A)  It receives more blood than the pulmonary circulation does. 
B)  It receives blood from the left ventricle. 
C)  It is a high-pressure system compared to the pulmonary circulation. 
D)  It receives blood from the left ventricle and is a high-pressure system compared to the pulmonary circulation. 
A)  It receives more blood than the pulmonary circulation does. 
B)  It receives blood from the left ventricle. 
C)  It is a high-pressure system compared to the pulmonary circulation. 
D)  It receives blood from the left ventricle and is a high-pressure system compared to the pulmonary circulation.

Question 17

The second heart sound is due to closure of the AV valves.

Accepted Answer

A) True 
 B)False

Question 18

The heart utilizes glucose almost exclusively for energy production.

Accepted Answer

A) True 
 B)False

Question 19

The amount of blood pumped out of the heart during each beat is known as the cardiac output.

Accepted Answer

A) True 
 B)False

Question 20

Why can't tetany of the heart occur in normal condition?

Accepted Answer

A)  There are no distinct motor units in the heart. 
B)  There is inadequate oxygen supply via the coronary circulation to metabolically support a sustained contraction. 
C)  The refractory period in cardiac muscle lasts almost as long as the duration of the resultant contraction. 
D)  The heart contracts with maximal force every beat so it is impossible to increase the strength of cardiac contraction. 
A)  There are no distinct motor units in the heart. 
B)  There is inadequate oxygen supply via the coronary circulation to metabolically support a sustained contraction. 
C)  The refractory period in cardiac muscle lasts almost as long as the duration of the resultant contraction. 
D)  The heart contracts with maximal force every beat so it is impossible to increase the strength of cardiac contraction.

The heart is posterior to the sternum.

Indicate which factor involved in the initiation and spread of cardiac excitation is being identified by using the answer code (options may be used more than once or not at all): -the normal pacemaker of the heart

Indicate which pressure relationship exists during the time in question by using the answer code (options may be used more than once or not at all): -when ventricular ejection is occurring

What is the low-resistance pathway that permits electrical activity pass from cell to cell in myocardial tissue?

The electrocardiogram is most useful in determining which component of cardiac output?

The AV and semilunar valves are never open at the same time.

Match heart characteristic with correct anatomical structure by using the answer code (options may be used more than once or not at all): -its cells have slow Ca²⁺ channels

Indicate the effects of sympathetic and parasympathetic stimulation on the heart by using the answer code (options may be used more than once or not at all): -increases the contractility of the atrial and ventricular muscle

Indicate which factor involved in the initiation and spread of cardiac excitation is being identified by using the answer code (options may be used more than once or not at all): -rapidly conducts the impulse down the ventricular septum and throughout much of the ventricular musculature

An increase in cardiac sympathetic activity ____________________ the rate of depolarization of the SA node.

Indicate the effects of sympathetic and parasympathetic stimulation on the heart by using the answer code (options may be used more than once or not at all): -increases the AV nodal delay

What normally carries out the fastest rate of autorhythmicity?

Arteries carry blood toward the ventricles.

Which statement concerning the AV nodal delay is correct?

The ECG is an actual recording of cardiac electrical activity.

Which statement is correct for the systemic circulation?

The second heart sound is due to closure of the AV valves.

The heart utilizes glucose almost exclusively for energy production.

The amount of blood pumped out of the heart during each beat is known as the cardiac output.

Why can't tetany of the heart occur in normal condition?

The Foundation of Physiology

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The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

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Exam 7: Cardiac Physiology

The heart is posterior to the sternum.

Indicate which factor involved in the initiation and spread of cardiac excitation is being identified by using the answer code (options may be used more than once or not at all): -the normal pacemaker of the heart

Indicate which pressure relationship exists during the time in question by using the answer code (options may be used more than once or not at all): -when ventricular ejection is occurring

What is the low-resistance pathway that permits electrical activity pass from cell to cell in myocardial tissue?

The electrocardiogram is most useful in determining which component of cardiac output?

The AV and semilunar valves are never open at the same time.

Match heart characteristic with correct anatomical structure by using the answer code (options may be used more than once or not at all): -its cells have slow Ca²⁺ channels

Indicate the effects of sympathetic and parasympathetic stimulation on the heart by using the answer code (options may be used more than once or not at all): -increases the contractility of the atrial and ventricular muscle

Indicate which factor involved in the initiation and spread of cardiac excitation is being identified by using the answer code (options may be used more than once or not at all): -rapidly conducts the impulse down the ventricular septum and throughout much of the ventricular musculature

An increase in cardiac sympathetic activity ____________________ the rate of depolarization of the SA node.

Indicate the effects of sympathetic and parasympathetic stimulation on the heart by using the answer code (options may be used more than once or not at all): -increases the AV nodal delay

What normally carries out the fastest rate of autorhythmicity?

Arteries carry blood toward the ventricles.

Which statement concerning the AV nodal delay is correct?

The ECG is an actual recording of cardiac electrical activity.

Which statement is correct for the systemic circulation?

The second heart sound is due to closure of the AV valves.

The heart utilizes glucose almost exclusively for energy production.

The amount of blood pumped out of the heart during each beat is known as the cardiac output.

Why can't tetany of the heart occur in normal condition?

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

Muscle Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine Glands

The Reproductive System

Filters