Question 1

The term systole means

Accepted Answer

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

Question 2

The second heart sound is produced by the

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. 
E)  blood rushing through the AV valves during diastole, creating a turbulent flow. 
A)  opening of the AV valves. 
B)  closing of the AV valves. 
C)  opening of the semilunar valves. 
D)  closing of the semilunar valves. 
E)  blood rushing through the AV valves during diastole, creating a turbulent flow.

Question 3

Most ventricular filling is accomplished during atrial contraction.

Accepted Answer

A) True 
 B)False

Question 4

The long refractory period of cardiac muscle prevents tetanic contractions of the heart.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Compare and contrast intrinsic and extrinsic controls of cardiac activity.

Accepted Answer

Intrinsic control of stroke volume (the

Question 7

All of the following decrease overall cardiac function except

Accepted Answer

A)  acetylcholine. 
B)  NE 
C)  afterload. 
D)  parasympathetic activity. 
E)  vagal activity. 
A)  acetylcholine. 
B)  NE 
C)  afterload. 
D)  parasympathetic activity. 
E)  vagal activity.

Question 8

According to the Frank-Starling law of the heart,

Accepted Answer

A)  the shorter the initial length of the cardiac muscle fibers prior to contraction the more forceful will be the subsequent contraction, because the fibers are already partially contracted. 
B)  increasing the venous return increases the end-diastolic volume, which leads to an increased stroke volume, so the heart normally pumps out all of the blood returned to it. 
C)  as cardiac output is reduced, blood pools in the vasculature so that arterial blood pressure increases. 
D)  the output of the left side of the heart must always exceed that of the right side of the heart because the right side only pumps blood to the lungs, whereas the left side must pump blood to the rest of the body. 
E)  the greater the stroke volume, the smaller will be the subsequent end-diastolic volume because as more blood is squeezed out, the heart cannot fill as completely. 
A)  the shorter the initial length of the cardiac muscle fibers prior to contraction the more forceful will be the subsequent contraction, because the fibers are already partially contracted. 
B)  increasing the venous return increases the end-diastolic volume, which leads to an increased stroke volume, so the heart normally pumps out all of the blood returned to it. 
C)  as cardiac output is reduced, blood pools in the vasculature so that arterial blood pressure increases. 
D)  the output of the left side of the heart must always exceed that of the right side of the heart because the right side only pumps blood to the lungs, whereas the left side must pump blood to the rest of the body. 
E)  the greater the stroke volume, the smaller will be the subsequent end-diastolic volume because as more blood is squeezed out, the heart cannot fill as completely.

Question 9

Which heart component is influence by NE but not by ACh?

Accepted Answer

A)  ventricular. 
B)  AV node. 
C)  heart rate. 
D)  SA node. 
E)  none of the above 
A)  ventricular. 
B)  AV node. 
C)  heart rate. 
D)  SA node. 
E)  none of the above

Question 10

The heart chamber that received blood from the vena cava is the:

Accepted Answer

A)  right ventricle. 
B)  left ventricle. 
C)  left atrium. 
D)  right atrium. 
E)  both (c) and (d) 
A)  right ventricle. 
B)  left ventricle. 
C)  left atrium. 
D)  right atrium. 
E)  both (c) and (d)

Question 11

An increase in cardiac sympathetic activity ____________________ the contractility of the ventricles.

Accepted Answer

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

Question 12

An increased ESV ____________________ the stroke volume.

Accepted Answer

The answer of An increased ESV ____________________ the stroke volume....

Question 13

The aortic valve

Accepted Answer

A)  prevents the backflow of blood into the aorta during ventricular diastole. 
B)  prevents the backflow of blood into the left ventricle during ventricular diastole. 
C)  prevents the backflow of blood into the right ventricle during ventricular diastole. 
D)  closes when the first heart sound is heard. 
E)  none of these answers. 
A)  prevents the backflow of blood into the aorta during ventricular diastole. 
B)  prevents the backflow of blood into the left ventricle during ventricular diastole. 
C)  prevents the backflow of blood into the right ventricle during ventricular diastole. 
D)  closes when the first heart sound is heard. 
E)  none of these answers.

Question 14

Using the following answer code, indicate which pressure relationship exists during the time in question.
-during ventricular diastole

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 15

The time period between the P wave and the QRS complex is lengthened. Which of the following is likely not functioning correctly?

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 16

A whistling murmur heard between the second and first heart sound would be indicative of

Accepted Answer

A)  a stenotic AV valve. 
B)  an insufficient AV valve. 
C)  a stenotic aortic or pulmonary semilunar valve. 
D)  an insufficient aortic or pulmonary semilunar valve. 
E)  no conclusions can be reached based on the information provided. 
A)  a stenotic AV valve. 
B)  an insufficient AV valve. 
C)  a stenotic aortic or pulmonary semilunar valve. 
D)  an insufficient aortic or pulmonary semilunar valve. 
E)  no conclusions can be reached based on the information provided.

Question 17

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 18

Indicate the proper order of the events during the cardiac cycle by placing numbers in the blanks preceding the events in sequence. The first and last events are already so indicated as a guide.

Accepted Answer

1, 8, 11,

Question 19

Use the answer code below to complete the following statements.
-The volume of blood ejected by each ventricle each minute is known as the _____.

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 20

Describe the cardiac cycle.

Accepted Answer

During ventricular filling, the AV valve

The term systole means

The second heart sound is produced by the

Most ventricular filling is accomplished during atrial contraction.

The long refractory period of cardiac muscle prevents tetanic contractions of the heart.

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

Compare and contrast intrinsic and extrinsic controls of cardiac activity.

All of the following decrease overall cardiac function except

According to the Frank-Starling law of the heart,

Which heart component is influence by NE but not by ACh?

The heart chamber that received blood from the vena cava is the:

An increase in cardiac sympathetic activity ____________________ the contractility of the ventricles.

An increased ESV ____________________ the stroke volume.

The aortic valve

Using the following answer code, indicate which pressure relationship exists during the time in question. -during ventricular diastole

The time period between the P wave and the QRS complex is lengthened. Which of the following is likely not functioning correctly?

A whistling murmur heard between the second and first heart sound would be indicative of

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

Indicate the proper order of the events during the cardiac cycle by placing numbers in the blanks preceding the events in sequence. The first and last events are already so indicated as a guide.

Use the answer code below to complete the following statements. -The volume of blood ejected by each ventricle each minute is known as the _____.

Describe the cardiac cycle.

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

Exam 9: Cardiac Physiology

The term systole means

The second heart sound is produced by the

Most ventricular filling is accomplished during atrial contraction.

The long refractory period of cardiac muscle prevents tetanic contractions of the heart.

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

Compare and contrast intrinsic and extrinsic controls of cardiac activity.

All of the following decrease overall cardiac function except

According to the Frank-Starling law of the heart,

Which heart component is influence by NE but not by ACh?

The heart chamber that received blood from the vena cava is the:

An increase in cardiac sympathetic activity ____________________ the contractility of the ventricles.

An increased ESV ____________________ the stroke volume.

The aortic valve

Using the following answer code, indicate which pressure relationship exists during the time in question. -during ventricular diastole

The time period between the P wave and the QRS complex is lengthened. Which of the following is likely not functioning correctly?

A whistling murmur heard between the second and first heart sound would be indicative of

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

Indicate the proper order of the events during the cardiac cycle by placing numbers in the blanks preceding the events in sequence. The first and last events are already so indicated as a guide.

Use the answer code below to complete the following statements. -The volume of blood ejected by each ventricle each minute is known as the _____.

Describe the cardiac cycle.

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