Question 1

Which of the following does NOT negatively influence the myocardium's contractility,thus increasing ESV?

Accepted Answer

A)  acetylcholine 
B)  preload 
C)  afterload 
D)  parasympathetic activity 
A)  acetylcholine 
B)  preload 
C)  afterload 
D)  parasympathetic activity B

Question 2

Ventricular ejection occurs once the afterload has been overcome.

Accepted Answer

A) True 
 B)False  True

Question 3

Which of the following is INCORRECT about rheumatic fever?

Accepted Answer

A)  It may cause a heart murmur. 
B)  It is an autoimmune disease. 
C)  It is triggered by a streptococcus bacterium. 
D)  The heart conduction system is initially destroyed. 
A)  It may cause a heart murmur. 
B)  It is an autoimmune disease. 
C)  It is triggered by a streptococcus bacterium. 
D)  The heart conduction system is initially destroyed. D

Question 4

The bundle of His and Purkinje system facilitate the rapid spread of the action potential throughout the ventricles.

Accepted Answer

A) True 
 B)False

Question 5

A patient has an EDV of 85 mL and an ESV of 35 mL with a heart rate of 50.What is this patient's cardiac output?

Accepted Answer

A)  2000 mL/min or 2.0 L/min 
B)  2500 mL/min or 2.5 L/min 
C)  4500 mL/min or 4.5 L/min 
D)  6500 mL/min or 6.5 L/min 
A)  2000 mL/min or 2.0 L/min 
B)  2500 mL/min or 2.5 L/min 
C)  4500 mL/min or 4.5 L/min 
D)  6500 mL/min or 6.5 L/min

Question 6

What produces the second heart sound?

Accepted Answer

A)  opening of the AV valves 
B)  closing of the AV valves 
C)  opening of the semilunar valves 
D)  closing of the semilunar valves 
A)  opening of the AV valves 
B)  closing of the AV valves 
C)  opening of the semilunar valves 
D)  closing of the semilunar valves

Question 7

Complete the following statements by using the answer code (options may be used more than once or not at all):
-The stroke volume may be calculated by end-diastolic volume minus _____.

Accepted Answer

A) stroke volume 
B) end-diastolic volume 
C) cardiac output 
D) heart rate 
E) end-systolic volume
F)sympathetic activity 
A) stroke volume 
B) end-diastolic volume 
C) cardiac output 
D) heart rate 
E) end-systolic volume
F)sympathetic activity

Question 8

The refractory period of cardiac muscle ________________________

Accepted Answer

A)  lasts longer than the contraction period. 
B)  is much longer than the refractory period in skeletal muscle. 
C)  allows tetanic contraction of the heart to occur to ensure smooth, coordinated ejection of blood from the ventricles. 
D)  lasts longer than the relaxation period. 
A)  lasts longer than the contraction period. 
B)  is much longer than the refractory period in skeletal muscle. 
C)  allows tetanic contraction of the heart to occur to ensure smooth, coordinated ejection of blood from the ventricles. 
D)  lasts longer than the relaxation period.

Question 9

The aortic valve prevents backflow of blood from the aorta into the left ventricle during ventricular diastole.

Accepted Answer

A) True 
 B)False

Question 10

What happens if the connection between the SA node and AV node becomes blocked?

Accepted Answer

A)  The ventricles will beat faster. 
B)  The ventricles will contract more slowly. 
C)  The ventricular rate of contraction will not be affected. 
D)  The stroke volume will increase. 
A)  The ventricles will beat faster. 
B)  The ventricles will contract more slowly. 
C)  The ventricular rate of contraction will not be affected. 
D)  The stroke volume will increase.

Question 11

Stroke volume is determined by the extent of venous return and parasympathetic activity.

Accepted Answer

A) True 
 B)False

Question 12

Which statement concerning action potentials in the heart is correct?

Accepted Answer

A)  The rising phase of the action potential in cardiac autorhythmic cells is due to a rapid Ca2+ influx. 
B)  The rising phase of the action potential in cardiac contractile cells is due to a rapid K+ influx. 
C)  The plateau phase of the action potential in cardiac contractile cells is due to a rapidCa2+ influx. 
D)  The plateau phase of the action potential in cardiac contractile cells is due to a rapid K+ influx. 
A)  The rising phase of the action potential in cardiac autorhythmic cells is due to a rapid Ca2+ influx. 
B)  The rising phase of the action potential in cardiac contractile cells is due to a rapid K+ influx. 
C)  The plateau phase of the action potential in cardiac contractile cells is due to a rapidCa2+ influx. 
D)  The plateau phase of the action potential in cardiac contractile cells is due to a rapid K+ influx.

Question 13

If a mitral valve damaged by rheumatic fever fails to open completely,what is it called?

Accepted Answer

A)  mitral stenosis 
B)  complete heart block 
C)  myocardial ischemia 
D)  mitral incompetence 
A)  mitral stenosis 
B)  complete heart block 
C)  myocardial ischemia 
D)  mitral incompetence

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

Describe the cardiac cycle.

Accepted Answer

The answer of Describe the cardiac cycle....

Question 17

Complete heart block results from a damaged AV node.

Accepted Answer

A) True 
 B)False

Question 18

Match heart characteristic with correct anatomical structure by using the answer code (options may be used more than once or not at all):
-during systole,it is forced closed by papillary muscle action

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 19

An increase in the end-diastolic volume ____________________ the stroke volume.

Accepted Answer

The answer of An increase in the end-diastolic volume ____________________...

Question 20

What happens during the isovolumetric phase of ventricular systole?

Accepted Answer

A)  The ventricles are relaxing isometrically. 
B)  The atrioventricular valves and semilunar valves are closed. 
C)  Blood is ejected into the great vessels. 
D)  Venous blood flows back to the heart. 
A)  The ventricles are relaxing isometrically. 
B)  The atrioventricular valves and semilunar valves are closed. 
C)  Blood is ejected into the great vessels. 
D)  Venous blood flows back to the heart.

Which of the following does NOT negatively influence the myocardium's contractility,thus increasing ESV?

Ventricular ejection occurs once the afterload has been overcome.

Which of the following is INCORRECT about rheumatic fever?

The bundle of His and Purkinje system facilitate the rapid spread of the action potential throughout the ventricles.

A patient has an EDV of 85 mL and an ESV of 35 mL with a heart rate of 50.What is this patient's cardiac output?

What produces the second heart sound?

Complete the following statements by using the answer code (options may be used more than once or not at all): -The stroke volume may be calculated by end-diastolic volume minus _____.

The refractory period of cardiac muscle ________________________

The aortic valve prevents backflow of blood from the aorta into the left ventricle during ventricular diastole.

What happens if the connection between the SA node and AV node becomes blocked?

Stroke volume is determined by the extent of venous return and parasympathetic activity.

Which statement concerning action potentials in the heart is correct?

If a mitral valve damaged by rheumatic fever fails to open completely,what is it called?

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

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

Describe the cardiac cycle.

Complete heart block results from a damaged AV node.

Match heart characteristic with correct anatomical structure by using the answer code (options may be used more than once or not at all): -during systole,it is forced closed by papillary muscle action

An increase in the end-diastolic volume ____________________ the stroke volume.

What happens during the isovolumetric phase of ventricular systole?

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Exam 7: Cardiac Physiology

Which of the following does NOT negatively influence the myocardium's contractility,thus increasing ESV?

Ventricular ejection occurs once the afterload has been overcome.

Which of the following is INCORRECT about rheumatic fever?

The bundle of His and Purkinje system facilitate the rapid spread of the action potential throughout the ventricles.

A patient has an EDV of 85 mL and an ESV of 35 mL with a heart rate of 50.What is this patient's cardiac output?

What produces the second heart sound?

Complete the following statements by using the answer code (options may be used more than once or not at all): -The stroke volume may be calculated by end-diastolic volume minus _____.

The refractory period of cardiac muscle ________________________

The aortic valve prevents backflow of blood from the aorta into the left ventricle during ventricular diastole.

What happens if the connection between the SA node and AV node becomes blocked?

Stroke volume is determined by the extent of venous return and parasympathetic activity.

Which statement concerning action potentials in the heart is correct?

If a mitral valve damaged by rheumatic fever fails to open completely,what is it called?

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

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

Describe the cardiac cycle.

Complete heart block results from a damaged AV node.

Match heart characteristic with correct anatomical structure by using the answer code (options may be used more than once or not at all): -during systole,it is forced closed by papillary muscle action

An increase in the end-diastolic volume ____________________ the stroke volume.

What happens during the isovolumetric phase of ventricular systole?

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