Question 1

Normally, the stroke volume of the right side of the heart is the same as the stroke volume of the left side of the heart.

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A)  desmosome. 
B)  septum. 
C)  gap junction. 
D)  T-tubule. 
E)  sarcoplasmic reticulum. 
A)  desmosome. 
B)  septum. 
C)  gap junction. 
D)  T-tubule. 
E)  sarcoplasmic reticulum.

Question 3

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified.
-Delays conduction of the impulse.

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 4

Use the following answer code to compare the magnitude of the items in question.
-A. Amount of oxygen in the blood in the pulmonary artery
B. Amount of oxygen in the blood in the pulmonary veins

Accepted Answer

A) A is greater than B 
B) B is greater than A 
C) A and B are equal 
A) A is greater than B 
B) B is greater than A 
C) A and B are equal

Question 5

The ECG is an actual recording of cardiac electrical activity.

Accepted Answer

A) True 
 B)False

Question 6

Indicate which ion is involved in each event being described by using the following answer code.
-The rapid falling phase of the cardiac action potential is brought about primarily by the outward diffusion of _____.

Accepted Answer

A) K+ 
B) Na+ 
C) Ca2+ 
A) K+ 
B) Na+ 
C) Ca2+

Question 7

Sympathetic stimulation increases the heart rate.

Accepted Answer

A) True 
 B)False

Question 8

Compare a stenotic and insufficient valve.

Accepted Answer

A stenotic valve is a stiff, narrow valv

Question 9

The chordae tendineae

Accepted Answer

A)  keep the AV valves from prolapsing during ventricular contraction. 
B)  hold the AV valves open during diastole. 
C)  hold the right and left ventricles together. 
D)  transmit the electrical impulse from the atria to the ventricles. 
E)  contract when the ventricles contract. 
A)  keep the AV valves from prolapsing during ventricular contraction. 
B)  hold the AV valves open during diastole. 
C)  hold the right and left ventricles together. 
D)  transmit the electrical impulse from the atria to the ventricles. 
E)  contract when the ventricles contract.

Question 10

The normal pacemaker of the heart is the

Accepted Answer

A)  SA node. 
B)  AV node. 
C)  bundle of His. 
D)  Purkinje system. 
E)  ventricular myocardium. 
A)  SA node. 
B)  AV node. 
C)  bundle of His. 
D)  Purkinje system. 
E)  ventricular myocardium.

Question 11

The action potential spreads through the atria by gap junctions, but there are no gap junctions present in the ventricles, so the impulse must be propagated throughout the ventricular myocardium by the bundle of His and Purkinje system.

Accepted Answer

A) True 
 B)False

Question 12

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified.
-Has the fastest rate of pacemaker activity.

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 13

If the EDV were held constant, increased stroke volume could be accomplished by

Accepted Answer

A)  increased sympathetic nerve activity to the heart. 
B)  increased parasympathetic nerve activity to the heart. 
C)  decreased contractility. 
D)  sleep. 
E)  increased arterial blood pressure. 
A)  increased sympathetic nerve activity to the heart. 
B)  increased parasympathetic nerve activity to the heart. 
C)  decreased contractility. 
D)  sleep. 
E)  increased arterial blood pressure.

Question 14

The term diastole means

Accepted Answer

A)  closure. 
B)  conduction. 
C)  contraction. 
D)  opening. 
E)  relaxation. 
A)  closure. 
B)  conduction. 
C)  contraction. 
D)  opening. 
E)  relaxation.

Question 15

Sympathetic stimulation increases contractile strength by:

Accepted Answer

A)  decreasing sodium permeability 
B)  increasing calcium permeability 
C)  closing funny channels 
D)  cause the resting potential to become more negative 
E)  increasing threshold 
A)  decreasing sodium permeability 
B)  increasing calcium permeability 
C)  closing funny channels 
D)  cause the resting potential to become more negative 
E)  increasing threshold

Question 16

Pacemaker activity by the Purkinje fibers is an example of an ectopic focus.

Accepted Answer

A) True 
 B)False

Question 17

Funny channels open when the membrane potential becomes hyperpolarized.

Accepted Answer

A) True 
 B)False

Question 18

Indicate which ion is involved in each event being described by using the following answer code.
-Slow inward diffusion of _____ is largely responsible for the plateau portion of the cardiac action potential.

Accepted Answer

A) K+ 
B) Na+ 
C) Ca2+ 
A) K+ 
B) Na+ 
C) Ca2+

Question 19

The AV valve controls the amount of blood entering the atrium from the venous system.

Accepted Answer

A) True 
 B)False

Question 20

The ESV of the heart averages about 140 ml.

Accepted Answer

A) True 
 B)False

Normally, the stroke volume of the right side of the heart is the same as the stroke volume of the left side of the heart.

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

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified. -Delays conduction of the impulse.

Use the following answer code to compare the magnitude of the items in question. -A. Amount of oxygen in the blood in the pulmonary artery B. Amount of oxygen in the blood in the pulmonary veins

The ECG is an actual recording of cardiac electrical activity.

Indicate which ion is involved in each event being described by using the following answer code. -The rapid falling phase of the cardiac action potential is brought about primarily by the outward diffusion of _____.

Sympathetic stimulation increases the heart rate.

Compare a stenotic and insufficient valve.

The chordae tendineae

The normal pacemaker of the heart is the

The action potential spreads through the atria by gap junctions, but there are no gap junctions present in the ventricles, so the impulse must be propagated throughout the ventricular myocardium by the bundle of His and Purkinje system.

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified. -Has the fastest rate of pacemaker activity.

If the EDV were held constant, increased stroke volume could be accomplished by

The term diastole means

Sympathetic stimulation increases contractile strength by:

Pacemaker activity by the Purkinje fibers is an example of an ectopic focus.

Funny channels open when the membrane potential becomes hyperpolarized.

Indicate which ion is involved in each event being described by using the following answer code. -Slow inward diffusion of _____ is largely responsible for the plateau portion of the cardiac action potential.

The AV valve controls the amount of blood entering the atrium from the venous system.

The ESV of the heart averages about 140 ml.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division and Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

The Blood Vessels and Blood Pressure

The Blood and Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine System

The Reproductive System

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Exam 9: Cardiac Physiology

Normally, the stroke volume of the right side of the heart is the same as the stroke volume of the left side of the heart.

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

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified. -Delays conduction of the impulse.

Use the following answer code to compare the magnitude of the items in question. -A. Amount of oxygen in the blood in the pulmonary artery B. Amount of oxygen in the blood in the pulmonary veins

The ECG is an actual recording of cardiac electrical activity.

Indicate which ion is involved in each event being described by using the following answer code. -The rapid falling phase of the cardiac action potential is brought about primarily by the outward diffusion of _____.

Sympathetic stimulation increases the heart rate.

Compare a stenotic and insufficient valve.

The chordae tendineae

The normal pacemaker of the heart is the

The action potential spreads through the atria by gap junctions, but there are no gap junctions present in the ventricles, so the impulse must be propagated throughout the ventricular myocardium by the bundle of His and Purkinje system.

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified. -Has the fastest rate of pacemaker activity.

If the EDV were held constant, increased stroke volume could be accomplished by

The term diastole means

Sympathetic stimulation increases contractile strength by:

Pacemaker activity by the Purkinje fibers is an example of an ectopic focus.

Funny channels open when the membrane potential becomes hyperpolarized.

Indicate which ion is involved in each event being described by using the following answer code. -Slow inward diffusion of _____ is largely responsible for the plateau portion of the cardiac action potential.

The AV valve controls the amount of blood entering the atrium from the venous system.

The ESV of the heart averages about 140 ml.

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division and Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

The Blood Vessels and Blood Pressure

The Blood and Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine System

The Reproductive System

Filters