Question 1

Which of the following chambers of the heart is surrounded by the thickest layer of myocardium?

Accepted Answer

A)  right atrium
B)  left atrium
C)  right ventricle
D)  left ventricle
E)  right auricleF) A) and B)
G) A) and C)

Question 2

The difference between a person's maximum cardiac output and resting cardiac output is called the

Accepted Answer

A)  stroke volume.
B)  peripheral resistance.
C)  afterload.
D)  cardiac reserve.
E)  venous return.F) B) and E)
G) B) and C)

Question 3

Which of the following correctly lists the sequence of structures that a cardiac action potential follows in order to excite normal contraction of the heart?

Accepted Answer

A)  Bundle of His,Purkinje fibers,Atrioventricular (AV) node
B)  Sinoatrial (S
A)  node,Purkinje fibers,AV node,Bundle of His
C)  Purkinje fibers,AV node,SA node,Bundle of His
D)  SA node,AV node,Bundle of His,Purkinje fibers
E)  Bundle of His,SA node,AV node,Purkinje fibersF) A) and E)
G) A) and D)

Question 4

The second heart sound (dupp) closely follows which of the events listed below?

Accepted Answer

A)  Valvular stenosis
B)  Semilunar valves opening
C)  Atrioventricular valves closing
D)  Semilunar valves closing
E)  Atrioventricular valves openingF) A) and D)
G) B) and E) D

Question 5

In comparison to a sedentary individual,a well-trained athlete will usually have all the following characteristics EXCEPT

Accepted Answer

A)  a higher cardiac reserve.
B)  a higher resting cardiac output.
C)  a higher stroke volume.
D)  hypertrophy of the heart.
E)  resting bradycardia.F) A) and E)
G) A) and D)

Question 6

In the diagram,which labeled structure prevents blood flow from the right ventricle back into the right atrium?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) C) and E)
G) B) and C)

Question 7

What labeled structure in the figure is the ligamentum arteriosum?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and B)
F) A) and C)

Question 8

The membrane that surrounds and protects the heart is called the

Accepted Answer

A)  pericardium.
B)  pleura.
C)  myocardium.
D)  mediastinum.
E)  endocardium.F) D) and E)
G) A) and B)

Question 9

Discuss the common nutrient sources used by cardiac muscle to produce ATP in a resting individual.

Accepted Answer

The answer of Discuss the common nutrient sources used by...

Question 10

In comparison to skeletal muscle fibers,the contractile fibers of the heart are depolarized for ____ period of time.

Accepted Answer

A)  a shorter
B)  a longer
C)  the sameD) B) and C)
E) All of the above B

Question 11

This structure in the heart initiates action potentials that stimulate contraction of the heart at constant rate of about 100 beats per minute.

Accepted Answer

A)  Cardiac accelerator nerves
B)  Atrioventricular node
C)  Cardiovascular center
D)  Sinoatrial node
E)  Bundle of HisF) A) and D)
G) A) and E)

Question 12

What of the following chambers of the heart contain deoxygenated blood?

Accepted Answer

A)  Left atrium and left ventricle
B)  Left atrium only
C)  Right atrium and right ventricle
D)  Right ventricle only
E)  Left atrium and right ventricleF) B) and E)
G) C) and D)

Question 13

During which of following periods does the largest volume of blood enter the arteries?

Accepted Answer

A)  atrial diastole
B)  ventricular diastole
C)  atrial systole
D)  ventricular systoleE) A) and D)
F) A) and C) D

Question 14

This is comprised of a thin layer of endothelium overlying a thin layer of connective tissue.

Accepted Answer

A)  C
B)  D
C)  E
D)  F
E)  GF) C) and E)
G) C) and D)

Question 15

This pouch-like structure increases the total filling capacity of the atrium.

Accepted Answer

A)  Ventricle
B)  Coronary sulcus
C)  Fossa ovalis
D)  Interatrial septum
E)  Auricle.F) All of the above
G) D) and E)

Question 16

In a fetus,this structure allows blood to flow directly from the pulmonary trunk into the aorta.

Accepted Answer

A)  Fossa ovalis
B)  Foramen ovale
C)  Trabeculae carneae
D)  Descending aorta
E)  Ductus arteriosusF) None of the above
G) All of the above

Question 17

In the diagram,which labeled structure is the pulmonary semilunar valve?

Accepted Answer

A)  B
B)  D
C)  E
D)  A
E)  None of these choicesF) C) and D)
G) A) and C)

Question 18

In the diagram,where is the left auricle of the left atrium?

Accepted Answer

A)  C
B)  F
C)  G
D)  H
E)  IF) None of the above
G) B) and D)

Question 19

Which structure in the figure is labeled B?

Accepted Answer

A)  left common carotid artery
B)  left subclavian artery
C)  left pulmonary vein
D)  mitral valveE) A) and D)
F) None of the above

Question 20

Cardiac output is the volume of blood ejected from the ______ ventricle into the _____ each minute.

Accepted Answer

A)  left,aorta
B)  right,aorta
C)  left or right,aorta or pulmonary trunk
D)  right,pulmonary trunk
E)  both left and right aorta are correctF) D) and E)
G) B) and E)

Exam 20: The Cardiovascular System: The Heart

Which of the following chambers of the heart is surrounded by the thickest layer of myocardium?

Correct AnswerverifiedShow Answer

The difference between a person's maximum cardiac output and resting cardiac output is called the

Correct AnswerverifiedShow Answer

Which of the following correctly lists the sequence of structures that a cardiac action potential follows in order to excite normal contraction of the heart?

Correct AnswerverifiedShow Answer

The second heart sound (dupp) closely follows which of the events listed below?

Correct AnswerverifiedD

In comparison to a sedentary individual,a well-trained athlete will usually have all the following characteristics EXCEPT

Correct AnswerverifiedShow Answer

In the diagram,which labeled structure prevents blood flow from the right ventricle back into the right atrium?

Correct AnswerverifiedShow Answer

What labeled structure in the figure is the ligamentum arteriosum?

Correct AnswerverifiedShow Answer

The membrane that surrounds and protects the heart is called the

Correct AnswerverifiedShow Answer

Discuss the common nutrient sources used by cardiac muscle to produce ATP in a resting individual.

Correct AnswerverifiedShow Answer

In comparison to skeletal muscle fibers,the contractile fibers of the heart are depolarized for ____ period of time.

Correct AnswerverifiedB

This structure in the heart initiates action potentials that stimulate contraction of the heart at constant rate of about 100 beats per minute.

Correct AnswerverifiedShow Answer

What of the following chambers of the heart contain deoxygenated blood?

Correct AnswerverifiedShow Answer

During which of following periods does the largest volume of blood enter the arteries?

Correct AnswerverifiedD

This is comprised of a thin layer of endothelium overlying a thin layer of connective tissue.

Correct AnswerverifiedShow Answer

This pouch-like structure increases the total filling capacity of the atrium.

Correct AnswerverifiedShow Answer

In a fetus,this structure allows blood to flow directly from the pulmonary trunk into the aorta.

Correct AnswerverifiedShow Answer

In the diagram,which labeled structure is the pulmonary semilunar valve?

Correct AnswerverifiedShow Answer

In the diagram,where is the left auricle of the left atrium?

Correct AnswerverifiedShow Answer

Which structure in the figure is labeled B?

Correct AnswerverifiedShow Answer

Cardiac output is the volume of blood ejected from the ______ ventricle into the _____ each minute.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Cardiac output is the volume of blood ejected from the __ ventricle into the _ each minute.

Correct Answer
verified