Question 1

According to the text, why is the wall of the left ventricle thicker than the wall of the right ventricle

Accepted Answer

A) The left ventricle must pump much more blood than the right ventricle, so it must have stronger walls. 
B) The right ventricle must pump much more blood than the left ventricle, so it has a larger chamber to accommodate the blood and a correspondingly thinner wall. 
C) The left ventricle must pump the same amount of blood into the high-resistance, high-pressure systemic system as does the right ventricle into the low-resistance, low-pressure pulmonary system. 
D) The right ventricle must create higher tension within its walls. 
A) The left ventricle must pump much more blood than the right ventricle, so it must have stronger walls. 
B) The right ventricle must pump much more blood than the left ventricle, so it has a larger chamber to accommodate the blood and a correspondingly thinner wall. 
C) The left ventricle must pump the same amount of blood into the high-resistance, high-pressure systemic system as does the right ventricle into the low-resistance, low-pressure pulmonary system. 
D) The right ventricle must create higher tension within its walls. C

Question 2

Which of these terms refers to the volume of blood ejected from each ventricle during a contraction

Accepted Answer

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

Question 3

____________________ is the insufficient circulation of oxygenated blood to cardiac muscle in order to maintain its aerobic metabolism.

Accepted Answer

Ischemia

Question 4

Match the factor involved in the initiation and spread of cardiac excitation, labelled a. through d. with the description. (Options may be used more than once or not at all.)
-the normal pacemaker of the heart

Accepted Answer

A) SA node 
B) AV node 
C) bundle of His and Purkinje system 
D) gap junction 
A) SA node 
B) AV node 
C) bundle of His and Purkinje system 
D) gap junction

Question 5

A(n) ____________________ is a clot attached to the wall of a vessel.

Accepted Answer

The answer of A(n) ____________________ is a clot attached to...

Question 6

The EDV of the heart averages about 65 mL.

Accepted Answer

A) True 
 B)False

Question 7

What does the QRS complex represent

Accepted Answer

A) depolarization of the atria 
B) depolarization of the ventricles 
C) the AV nodal delay 
D) repolarization of the ventricles 
A) depolarization of the atria 
B) depolarization of the ventricles 
C) the AV nodal delay 
D) repolarization of the ventricles

Question 8

Angina pectoris develops from the abundance of oxygen of blood in the coronary circulation.

Accepted Answer

A) True 
 B)False

Question 9

Match the ions, labelled a. through c., with the events being described. (Options may be used more than once or not at all.)
-Inactivation of _____ channels brings about the slow drift of membrane potential to threshold in the cardiac autorhythmic cells.

Accepted Answer

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

Question 10

How does hypertension influence heart activity

Accepted Answer

Hypertension, also known as high blood p

Question 11

Match the cardiovascular features, labelled a. through d., with their correct characteristic.
-consists of abnormal smooth muscle cells, cholesterol deposits, scar tissue, and possible calcium deposits plaque

Accepted Answer

A) angina pectoris 
B) embolus 
C) atherosclerosis 
D) thrombus 
A) angina pectoris 
B) embolus 
C) atherosclerosis 
D) thrombus

Question 12

Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.)
-The two main determinants of cardiac output are stroke volume and _____.

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 13

Parasympathetic stimulation slows the rate of depolarization of the SA node and thus decreases the heart rate.

Accepted Answer

A) True 
 B)False

Question 14

Cardiac muscle receives its blood supply primarily during ventricular systole when blood is being pumped out into the aorta.

Accepted Answer

A) True 
 B)False

Question 15

Match the anatomical structures, labelled a. through e., with the heart characteristics. (Options may be used more than once or not at all.)
-its cells have slow Ca²⁺ channels

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 16

Complete heart block results from a damaged AV node.

Accepted Answer

A) True 
 B)False

Question 17

The amount of blood pumped out of the heart during each beat is known as the cardiac output.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following describes blood returning from the lungs

Accepted Answer

A) It enters the right atrium. 
B) It enters the left atrium. 
C) It is poorly oxygenated. 
D) It enters the left ventricle. 
A) It enters the right atrium. 
B) It enters the left atrium. 
C) It is poorly oxygenated. 
D) It enters the left ventricle.

Question 19

Which of the following happens during isovolumetric ventricular contraction

Accepted Answer

A) The ventricles fill rapidly. 
B) No blood enters or leaves the ventricles. 
C) The maximum volume of blood is ejected. 
D) The maximum rate of ejection occurs. 
A) The ventricles fill rapidly. 
B) No blood enters or leaves the ventricles. 
C) The maximum volume of blood is ejected. 
D) The maximum rate of ejection occurs.

Question 20

What is the function of the ventricular conduction system of the heart

Accepted Answer

A) to spread the action potential throughout the large ventricular mass to ensure a single, coordinated contraction of the ventricles 
B) to spread the action potential in the absence of sympathetic stimulation 
C) to set the heart rate 
D) to spread the action potential throughout the atria and ventricles 
A) to spread the action potential throughout the large ventricular mass to ensure a single, coordinated contraction of the ventricles 
B) to spread the action potential in the absence of sympathetic stimulation 
C) to set the heart rate 
D) to spread the action potential throughout the atria and ventricles

According to the text, why is the wall of the left ventricle thicker than the wall of the right ventricle

Which of these terms refers to the volume of blood ejected from each ventricle during a contraction

____________________ is the insufficient circulation of oxygenated blood to cardiac muscle in order to maintain its aerobic metabolism.

Match the factor involved in the initiation and spread of cardiac excitation, labelled a. through d. with the description. (Options may be used more than once or not at all.) -the normal pacemaker of the heart

A(n) ____________________ is a clot attached to the wall of a vessel.

The EDV of the heart averages about 65 mL.

What does the QRS complex represent

Angina pectoris develops from the abundance of oxygen of blood in the coronary circulation.

Match the ions, labelled a. through c., with the events being described. (Options may be used more than once or not at all.) -Inactivation of _____ channels brings about the slow drift of membrane potential to threshold in the cardiac autorhythmic cells.

How does hypertension influence heart activity

Match the cardiovascular features, labelled a. through d., with their correct characteristic. -consists of abnormal smooth muscle cells, cholesterol deposits, scar tissue, and possible calcium deposits plaque

Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) -The two main determinants of cardiac output are stroke volume and _____.

Parasympathetic stimulation slows the rate of depolarization of the SA node and thus decreases the heart rate.

Cardiac muscle receives its blood supply primarily during ventricular systole when blood is being pumped out into the aorta.

Match the anatomical structures, labelled a. through e., with the heart characteristics. (Options may be used more than once or not at all.) -its cells have slow Ca²⁺ channels

Complete heart block results from a damaged AV node.

The amount of blood pumped out of the heart during each beat is known as the cardiac output.

Which of the following describes blood returning from the lungs

Which of the following happens during isovolumetric ventricular contraction

What is the function of the ventricular conduction system of the heart

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The Peripheral Nervous System: Sensory, Autonomic, Somatic

Principles of Endocrinology: The Central Endocrine Glands

The Endocrine Glands

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Exam 8: Cardiac Physiology

According to the text, why is the wall of the left ventricle thicker than the wall of the right ventricle

Which of these terms refers to the volume of blood ejected from each ventricle during a contraction

____________________ is the insufficient circulation of oxygenated blood to cardiac muscle in order to maintain its aerobic metabolism.

Match the factor involved in the initiation and spread of cardiac excitation, labelled a. through d. with the description. (Options may be used more than once or not at all.) -the normal pacemaker of the heart

A(n) ____________________ is a clot attached to the wall of a vessel.

The EDV of the heart averages about 65 mL.

What does the QRS complex represent

Angina pectoris develops from the abundance of oxygen of blood in the coronary circulation.

Match the ions, labelled a. through c., with the events being described. (Options may be used more than once or not at all.) -Inactivation of _____ channels brings about the slow drift of membrane potential to threshold in the cardiac autorhythmic cells.

How does hypertension influence heart activity

Match the cardiovascular features, labelled a. through d., with their correct characteristic. -consists of abnormal smooth muscle cells, cholesterol deposits, scar tissue, and possible calcium deposits plaque

Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) -The two main determinants of cardiac output are stroke volume and _____.

Parasympathetic stimulation slows the rate of depolarization of the SA node and thus decreases the heart rate.

Cardiac muscle receives its blood supply primarily during ventricular systole when blood is being pumped out into the aorta.

Match the anatomical structures, labelled a. through e., with the heart characteristics. (Options may be used more than once or not at all.) -its cells have slow Ca²⁺ channels

Complete heart block results from a damaged AV node.

The amount of blood pumped out of the heart during each beat is known as the cardiac output.

Which of the following describes blood returning from the lungs

Which of the following happens during isovolumetric ventricular contraction

What is the function of the ventricular conduction system of the heart

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System: Sensory, Autonomic, Somatic

Principles of Endocrinology: The Central Endocrine Glands

The Endocrine Glands

Muscle Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

The Reproductive System

Filters