Question 1

Complete each of the following statements with increases, decreases, or has no effect on.
An increase in venous return ____________________ the end-diastolic volume.

Accepted Answer

The answer of Complete each of the following statements with...

Question 2

Extrasystole of the heart means that it

Accepted Answer

A)  beats too slowly 
B)  fills with too much blood 
C)  has a complete block 
D)  loses blood 
E)  produces a premature beat 
A)  beats too slowly 
B)  fills with too much blood 
C)  has a complete block 
D)  loses blood 
E)  produces a premature beat

Question 3

Fibrillation is the

Accepted Answer

A)  backflow of blood throughout the heart 
B)  coordinated function of nodal cells 
C)  failure of the heart valves to function 
D)  flow of blood through the heart's fibrous skeleton 
E)  uncoordinated excitation and contraction of cardiac cells 
A)  backflow of blood throughout the heart 
B)  coordinated function of nodal cells 
C)  failure of the heart valves to function 
D)  flow of blood through the heart's fibrous skeleton 
E)  uncoordinated excitation and contraction of cardiac cells

Question 4

The membrane potential of cardiac muscle cells at rest is about ____ mV.

Accepted Answer

A)  -110 
B)  -90 
C)  -70 
D)  -50 
E)  -30 
A)  -110 
B)  -90 
C)  -70 
D)  -50 
E)  -30

Question 5

Complete each of the following statments.
A(n) ____________________ is a clot attached to the wall of a vessel.

Accepted Answer

The answer of Complete each of the following statments.
A(n) ____________________...

Question 6

Complete each of the following statments.
The refractory period in skeletal muscle is ____________________ than the refractory period in cardiac muscle.

Accepted Answer

The answer of Complete each of the following statments.
The refractory...

Question 7

The AV node

Accepted Answer

A)  is the normal pacemaker of the heart 
B)  is the only electrical connection between the atria and the ventricles 
C)  rapidly conducts the impulse from the atria to the ventricles so that they contract simultaneously 
D)  is not innervated by the vagus nerve 
E)  has the slowest rate of depolarization in the heart 
A)  is the normal pacemaker of the heart 
B)  is the only electrical connection between the atria and the ventricles 
C)  rapidly conducts the impulse from the atria to the ventricles so that they contract simultaneously 
D)  is not innervated by the vagus nerve 
E)  has the slowest rate of depolarization in the heart

Question 8

Complete each of the following statements with increases, decreases, or has no effect on.
An increase in afterload ____________________ the length of time available for ventricular ejection.

Accepted Answer

The answer of Complete each of the following statements with...

Question 9

The SA node is the only part of the heart that can function as the heart's pacemaker.

Accepted Answer

A) True 
 B)False

Question 10

If the EDV were held constant, increased cardiac output could be accomplished by

Accepted Answer

A)  decreased sympathetic stimulation of the heart 
B)  decreased parasympathetic stimulation of the heart 
C)  decreased contractility 
D)  increased length of isovolumetric contraction 
E)  increased arterial blood pressure 
A)  decreased sympathetic stimulation of the heart 
B)  decreased parasympathetic stimulation of the heart 
C)  decreased contractility 
D)  increased length of isovolumetric contraction 
E)  increased arterial blood pressure

Question 11

Semilunar valves

Accepted Answer

A)  prevent backflow of blood from the ventricles to the atria 
B)  prevent backflow of blood from the atria to the ventricles 
C)  prevent backflow of blood from the ventricles to the arterial trunks 
D)  prevent backflow of blood from the arterial trunks to the ventricles 
E)  none of these 
A)  prevent backflow of blood from the ventricles to the atria 
B)  prevent backflow of blood from the atria to the ventricles 
C)  prevent backflow of blood from the ventricles to the arterial trunks 
D)  prevent backflow of blood from the arterial trunks to the ventricles 
E)  none of these

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

The volume of blood ejected from each ventricle during a contraction is called the

Accepted Answer

A)  end-diastolic volume 
B)  end-systolic volume 
C)  stroke volume 
D)  cardiac output 
E)  cardiac reserve 
A)  end-diastolic volume 
B)  end-systolic volume 
C)  stroke volume 
D)  cardiac output 
E)  cardiac reserve

Question 14

Not all forms of cholesterol are equally harmful to the heart.

Accepted Answer

A) True 
 B)False

Question 15

Sympathetic stimulation of the heart

Accepted Answer

A)  increases the heart rate 
B)  increases the heart's contractility 
C)  shifts the Frank-Starling curve to the left 
D)  involves the release of norepinephrine 
E)  all of these 
A)  increases the heart rate 
B)  increases the heart's contractility 
C)  shifts the Frank-Starling curve to the left 
D)  involves the release of norepinephrine 
E)  all of these

Question 16

The dicrotic notch on the aortic pressure curve is due to

Accepted Answer

A)  a disturbance set up by the aortic valve closing 
B)  a disturbance set up when the AV valves close 
C)  elastic recoil of the aorta during ventricular diastole 
D)  turbulent flow through a stenotic valve 
E)  atherosclerosis in the aorta 
A)  a disturbance set up by the aortic valve closing 
B)  a disturbance set up when the AV valves close 
C)  elastic recoil of the aorta during ventricular diastole 
D)  turbulent flow through a stenotic valve 
E)  atherosclerosis in the aorta

Question 17

The first heart sound signals the onset of ventricular depolarization.

Accepted Answer

A) True 
 B)False

Question 18

An 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 19

Complete each of the following statements with increases, decreases, or has no effect on.
An increase in cardiac sympathetic activity ____________________ the stroke volume.

Accepted Answer

The answer of Complete each of the following statements with...

Question 20

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

Exam 9: A--Cardiac Physiology

Complete each of the following statements with increases, decreases, or has no effect on. An increase in venous return ____________________ the end-diastolic volume.

Extrasystole of the heart means that it

Fibrillation is the

The membrane potential of cardiac muscle cells at rest is about ____ mV.

Complete each of the following statments. A(n) ____________________ is a clot attached to the wall of a vessel.

Complete each of the following statments. The refractory period in skeletal muscle is ____________________ than the refractory period in cardiac muscle.

The AV node

Complete each of the following statements with increases, decreases, or has no effect on. An increase in afterload ____________________ the length of time available for ventricular ejection.

The SA node is the only part of the heart that can function as the heart's pacemaker.

If the EDV were held constant, increased cardiac output could be accomplished by

Semilunar valves

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

The volume of blood ejected from each ventricle during a contraction is called the

Not all forms of cholesterol are equally harmful to the heart.

Sympathetic stimulation of the heart

The dicrotic notch on the aortic pressure curve is due to

The first heart sound signals the onset of ventricular depolarization.

An 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.

Complete each of the following statements with increases, decreases, or has no effect on. An increase in cardiac sympathetic activity ____________________ the stroke volume.

The term systole means

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

A--The Central Nervous System

B--The Central Nervous System

A--The Peripheral Nervous System: Afferent Division; Special Senses

B--The Peripheral Nervous System: Afferent Division; Special Senses

The Peripheral Nervous System: Efferent Division

A--Muscle Physiology

B--Muscle Physiology

B--Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

A--The Respiratory System

B--The Respiratory System

A--The Urinary System

B--The Urinary System

A--Fluid and Acid-Base Balance

B--Fluid and Acid-Base Balance

A--The Digestive System

B--The Digestive System

Energy Balance and Temperature Regulation

A--Principles of Endocrinology: the Central Endocrine Glands

B--Principles of Endocrinology: the Central Endocrine Glands

A--The Peripheral Endocrine Glands

B--The Peripheral Endocrine Glands

A--The Reproductive System

B--The Reproductive System

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