Question 1

Up to 40% of the cell volume of cardiac muscle cells is occupied by mitochondria.

Accepted Answer

A) True 
 B)False

Question 2

Which number on the diagram represents maximal blood pressure recorded in the aorta?

Accepted Answer

A)  10 
B)  12 
C)  13 
D)  19 
A)  10 
B)  12 
C)  13 
D)  19

Question 3

Which valve is associated with the S2 heart sound?

Accepted Answer

A)  tricuspid. 
B)  mitral. 
C)  bicuspid. 
D)  both (a) and (b) above. 
E)  none of these answers. 
A)  tricuspid. 
B)  mitral. 
C)  bicuspid. 
D)  both (a) and (b) above. 
E)  none of these answers.

Question 4

An increase in EDV ____________________ the stroke volume.

Accepted Answer

The answer of An increase in EDV ____________________ the stroke...

Question 5

Use the answer code below to complete the following statements.
-The minimum volume of blood that the ventricle contains after emptying is complete is 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 6

____________ and ____________ muscles are associated with AV valves and prevent the valves from everting.

Accepted Answer

Chordae te

Question 7

Match heart characteristic with correct anatomical structure. Choices may be used more than once or not at all.
-contraction of this generates blood pressure

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

Contraction of the spirally arranged cardiac muscle fibers produces a wringing effect for efficient pumping.

Accepted Answer

A) True 
 B)False

Question 9

The ____________________ is the normal pacemaker of the heart.

Accepted Answer

The answer of The ____________________ is the normal pacemaker of...

Question 10

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified.
-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 11

Match heart characteristic with correct anatomical structure. Choices may be used more than once or not at all.
-its fast Ca²+ channels help initiate

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 12

During heart failure,

Accepted Answer

A)  the Frank-Starling curve is shifted to the left. 
B)  the heart pumps out a smaller stroke volume than normal for a given end-diastolic volume. 
C)  a compensatory increase in sympathetic activity increases the contractility of the heart to normal in the early stages of the disease. 
D)  both (b) and (c) above. 
E)  all of these answers. 
A)  the Frank-Starling curve is shifted to the left. 
B)  the heart pumps out a smaller stroke volume than normal for a given end-diastolic volume. 
C)  a compensatory increase in sympathetic activity increases the contractility of the heart to normal in the early stages of the disease. 
D)  both (b) and (c) above. 
E)  all of these answers.

Question 13

Which is true when you are sympathetically stimulated?

Accepted Answer

A)  the SA node depolarizes more rapidly. 
B)  the myocardium repolarizes more rapidly. 
C)  more Ca2+ results in more sarcomere crossbridge attachments. 
D)  norepinephrine is stimulating the heart. 
E)  all of these answers. 
A)  the SA node depolarizes more rapidly. 
B)  the myocardium repolarizes more rapidly. 
C)  more Ca2+ results in more sarcomere crossbridge attachments. 
D)  norepinephrine is stimulating the heart. 
E)  all of these answers.

Question 14

An insufficient AV valve

Accepted Answer

A)  fails to open completely. 
B)  fails to close completely. 
C)  produces a gurgling diastolic murmur. 
D)  fails to open completely and produces a gurgling diastolic murmur. 
E)  fails to close completely and produces a gurgling diastolic murmur. 
A)  fails to open completely. 
B)  fails to close completely. 
C)  produces a gurgling diastolic murmur. 
D)  fails to open completely and produces a gurgling diastolic murmur. 
E)  fails to close completely and produces a gurgling diastolic murmur.

Question 15

Indicate which ion is involved in each event being described by using the following answer code.
-Ion which passes through funny channels.

Accepted Answer

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

Question 16

Use the following answer code to compare the magnitude of the items in question.
-A. volume of blood in the ventricles at the onset of isovolumetric ventricular contraction
B. volume of blood in the ventricles at the end of isovolumetric ventricular contraction

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 17

Which molecule(s) induce vasodilation of coronary arteries?

Accepted Answer

A)  adenosine. 
B)  adenosine triphosphate. 
C)  nitric oxide. 
D)  both (a) and (b) above. 
E)  all these answers. 
A)  adenosine. 
B)  adenosine triphosphate. 
C)  nitric oxide. 
D)  both (a) and (b) above. 
E)  all these answers.

Question 18

The heart muscle receives its oxygen and nutrients directly from the blood within its chambers during ventricular diastole.

Accepted Answer

A) True 
 B)False

Question 19

The heart undergoes tetanic contraction during sympathetic stimulation to squeeze out more blood.

Accepted Answer

A) True 
 B)False

Question 20

The ____________________ is the volume of blood pumped by each ventricle/minute.

Accepted Answer

The answer of The ____________________ is the volume of blood...

Up to 40% of the cell volume of cardiac muscle cells is occupied by mitochondria.

Which number on the diagram represents maximal blood pressure recorded in the aorta?

Which valve is associated with the S2 heart sound?

An increase in EDV ____________________ the stroke volume.

Use the answer code below to complete the following statements. -The minimum volume of blood that the ventricle contains after emptying is complete is the _____.

and muscles are associated with AV valves and prevent the valves from everting.

Match heart characteristic with correct anatomical structure. Choices may be used more than once or not at all. -contraction of this generates blood pressure

Contraction of the spirally arranged cardiac muscle fibers produces a wringing effect for efficient pumping.

The ____________________ is the normal pacemaker of the heart.

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified. -Rapidly conducts the impulse down the ventricular septum and throughout much of the ventricular musculature.

Match heart characteristic with correct anatomical structure. Choices may be used more than once or not at all. -its fast Ca²⁺ channels help initiate

During heart failure,

Which is true when you are sympathetically stimulated?

An insufficient AV valve

Indicate which ion is involved in each event being described by using the following answer code. -Ion which passes through funny channels.

Use the following answer code to compare the magnitude of the items in question. -A. volume of blood in the ventricles at the onset of isovolumetric ventricular contraction B. volume of blood in the ventricles at the end of isovolumetric ventricular contraction

Which molecule(s) induce vasodilation of coronary arteries?

The heart muscle receives its oxygen and nutrients directly from the blood within its chambers during ventricular diastole.

The heart undergoes tetanic contraction during sympathetic stimulation to squeeze out more blood.

The ____________________ is the volume of blood pumped by each ventricle/minute.

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

Up to 40% of the cell volume of cardiac muscle cells is occupied by mitochondria.

Which number on the diagram represents maximal blood pressure recorded in the aorta?

Which valve is associated with the S2 heart sound?

An increase in EDV ____________________ the stroke volume.

Use the answer code below to complete the following statements. -The minimum volume of blood that the ventricle contains after emptying is complete is the _____.

____________ and ____________ muscles are associated with AV valves and prevent the valves from everting.

Match heart characteristic with correct anatomical structure. Choices may be used more than once or not at all. -contraction of this generates blood pressure

Contraction of the spirally arranged cardiac muscle fibers produces a wringing effect for efficient pumping.

The ____________________ is the normal pacemaker of the heart.

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified. -Rapidly conducts the impulse down the ventricular septum and throughout much of the ventricular musculature.

Match heart characteristic with correct anatomical structure. Choices may be used more than once or not at all. -its fast Ca²+ channels help initiate

During heart failure,

Which is true when you are sympathetically stimulated?

An insufficient AV valve

Indicate which ion is involved in each event being described by using the following answer code. -Ion which passes through funny channels.

Use the following answer code to compare the magnitude of the items in question. -A. volume of blood in the ventricles at the onset of isovolumetric ventricular contraction B. volume of blood in the ventricles at the end of isovolumetric ventricular contraction

Which molecule(s) induce vasodilation of coronary arteries?

The heart muscle receives its oxygen and nutrients directly from the blood within its chambers during ventricular diastole.

The heart undergoes tetanic contraction during sympathetic stimulation to squeeze out more blood.

The ____________________ is the volume of blood pumped by each ventricle/minute.

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

and muscles are associated with AV valves and prevent the valves from everting.

Match heart characteristic with correct anatomical structure. Choices may be used more than once or not at all. -its fast Ca²⁺ channels help initiate