Question 1

Which number on the diagram represents an event that is occurring at the same time the semilunar valves are closing?

Accepted Answer

A)  2 
B)  11 
C)  13 
D)  20 
A)  2 
B)  11 
C)  13 
D)  20

Question 2

Blood flow through the coronary circulation

Accepted Answer

A)  supplies oxygenated blood to the myocardium 
B)  is the same at rest as during exercise 
C)  supplies only the ventricles with blood 
D)  is similar to blood flow in the pulmonary circulation 
E)  none of the above 
A)  supplies oxygenated blood to the myocardium 
B)  is the same at rest as during exercise 
C)  supplies only the ventricles with blood 
D)  is similar to blood flow in the pulmonary circulation 
E)  none of the above

Question 3

The period lasting from closure of the AV valve to opening of the aortic valve is known as

Accepted Answer

A)  isovolumetric ventricular contraction. 
B)  isovolumetric ventricular relaxation. 
C)  the rapid ejection phase. 
D)  the rapid filling phase. 
E)  none of these answers. 
A)  isovolumetric ventricular contraction. 
B)  isovolumetric ventricular relaxation. 
C)  the rapid ejection phase. 
D)  the rapid filling phase. 
E)  none of these answers.

Question 4

Indicate which ion is involved in each event being described by using the following answer code.
-Parasympathetic stimulation increases the permeability of the SA node to _____, whereas sympathetic stimulation decreases the permeability to this same ion.

Accepted Answer

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

Question 5

Gap junctions are absent between atrial and ventricular cells.

Accepted Answer

A) True 
 B)False

Question 6

Match EKG feature with correct characteristic.
-Time during which ventricles are filling.

Accepted Answer

A) P wave 
B) QRS complex 
C) T wave 
D) PR interval 
E) TP interval
F)ST segment 
A) P wave 
B) QRS complex 
C) T wave 
D) PR interval 
E) TP interval
F)ST segment

Question 7

The action potential impulse is passing through the AV node between the P wave and QRS complex.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

MATCHING: ART
   
The following questions refer to the accompanying diagram of the heart. Eight structures (vessels or chambers) labels have been removed and replaced with letters A-H. Match the letter with list of missing terms below to complete the diagram.
-aorta

Accepted Answer

The answer of MATCHING: ART
   
The following questions...

Question 10

Most blood flow through the coronary vessels occurs during ventricular systole when the heart is driving blood forward.

Accepted Answer

A) True 
 B)False

Question 11

The systemic circulation

Accepted Answer

A)  receives more blood than the pulmonary circulation does. 
B)  receives blood from the left ventricle. 
C)  is a high pressure system compared to the pulmonary circulation. 
D)  receives blood from the left ventricle and is a high pressure system compared to the pulmonary circulation. 
E)  all of these answers. 
A)  receives more blood than the pulmonary circulation does. 
B)  receives blood from the left ventricle. 
C)  is a high pressure system compared to the pulmonary circulation. 
D)  receives blood from the left ventricle and is a high pressure system compared to the pulmonary circulation. 
E)  all of these answers.

Question 12

The wall of the left ventricle is thicker than the wall of the right ventricle because the

Accepted Answer

A)  left ventricle must pump much more blood than the right ventricle so it must have stronger walls. 
B)  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)  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)  right ventricle must create higher tension within its walls. 
E)  left ventricle must pump oxygenated blood, which requires more energy than pumping unoxygenated blood. 
A)  left ventricle must pump much more blood than the right ventricle so it must have stronger walls. 
B)  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)  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)  right ventricle must create higher tension within its walls. 
E)  left ventricle must pump oxygenated blood, which requires more energy than pumping unoxygenated blood.

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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. 
E)  has the fastest 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. 
E)  has the fastest rate of depolarization in the heart.

Question 15

The EDV of the heart averages about 65 ml.

Accepted Answer

A) True 
 B)False

Question 16

Increased EDV results in decreased stroke volume.

Accepted Answer

A) True 
 B)False

Question 17

During exercise, the cardiac output ____________________.

Accepted Answer

The answer of During exercise, the cardiac output ____________________....

Question 18

Use the following answer code to compare the magnitude of the items in question.
-A. Pressure in the aorta
B. Pressure in the pulmonary artery

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 19

The _________ phase of a cardiac action potential is associated with calcium influx while the ______ phase is associated with potassium efflux.

Accepted Answer

The answer of The _________ phase of a cardiac action...

Question 20

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

Accepted Answer

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

Which number on the diagram represents an event that is occurring at the same time the semilunar valves are closing?

Blood flow through the coronary circulation

The period lasting from closure of the AV valve to opening of the aortic valve is known as

Indicate which ion is involved in each event being described by using the following answer code. -Parasympathetic stimulation increases the permeability of the SA node to _____, whereas sympathetic stimulation decreases the permeability to this same ion.

Gap junctions are absent between atrial and ventricular cells.

Match EKG feature with correct characteristic. -Time during which ventricles are filling.

The action potential impulse is passing through the AV node between the P wave and QRS complex.

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

MATCHING: ART The following questions refer to the accompanying diagram of the heart. Eight structures (vessels or chambers) labels have been removed and replaced with letters A-H. Match the letter with list of missing terms below to complete the diagram. -aorta

Most blood flow through the coronary vessels occurs during ventricular systole when the heart is driving blood forward.

The systemic circulation

The wall of the left ventricle is thicker than the wall of the right ventricle because the

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

The AV node

The EDV of the heart averages about 65 ml.

Increased EDV results in decreased stroke volume.

During exercise, the cardiac output ____________________.

Use the following answer code to compare the magnitude of the items in question. -A. Pressure in the aorta B. Pressure in the pulmonary artery

The ___ phase of a cardiac action potential is associated with calcium influx while the phase is associated with potassium efflux.

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

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

Which number on the diagram represents an event that is occurring at the same time the semilunar valves are closing?

Blood flow through the coronary circulation

The period lasting from closure of the AV valve to opening of the aortic valve is known as

Indicate which ion is involved in each event being described by using the following answer code. -Parasympathetic stimulation increases the permeability of the SA node to _____, whereas sympathetic stimulation decreases the permeability to this same ion.

Gap junctions are absent between atrial and ventricular cells.

Match EKG feature with correct characteristic. -Time during which ventricles are filling.

The action potential impulse is passing through the AV node between the P wave and QRS complex.

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

MATCHING: ART The following questions refer to the accompanying diagram of the heart. Eight structures (vessels or chambers) labels have been removed and replaced with letters A-H. Match the letter with list of missing terms below to complete the diagram. -aorta

Most blood flow through the coronary vessels occurs during ventricular systole when the heart is driving blood forward.

The systemic circulation

The wall of the left ventricle is thicker than the wall of the right ventricle because the

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

The AV node

The EDV of the heart averages about 65 ml.

Increased EDV results in decreased stroke volume.

During exercise, the cardiac output ____________________.

Use the following answer code to compare the magnitude of the items in question. -A. Pressure in the aorta B. Pressure in the pulmonary artery

The _________ phase of a cardiac action potential is associated with calcium influx while the ______ phase is associated with potassium efflux.

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

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

The ___ phase of a cardiac action potential is associated with calcium influx while the phase is associated with potassium efflux.