Question 1

Oxygen-poor blood passes through

Accepted Answer

A)  the right AV (tricuspid)  valve and pulmonary valve.
B)  the right AV (tricuspid)  valve only.
C)  the left AV (bicuspid)  valve and aortic valve.
D)  the left AV (bicuspid)  valve only.
E)  the pulmonary and aortic valves.F) B) and D)
G) All of the above

Question 2

Opening and closing of the heart valves is caused by

Accepted Answer

A)  breathing.
B)  gravity.
C)  valves contracting and relaxing.
D)  osmotic gradients.
E)  pressure gradients.F) A) and C)
G) B) and C)

Question 3

During isovolumetric contraction, the pressure in the ventricles

Accepted Answer

A)  falls rapidly.
B)  rises rapidly.
C)  remains constant.
D)  rises and then falls.
E)  falls and then rises.F) A) and E)
G) B) and D)

Question 4

This is the correct path of an electrical excitation from the pacemaker to a cardiocyte in the left ventricle (LV) .

Accepted Answer

A)  sinoatrial (S
A)   node → atrioventricular (AV)  bundle → atrioventricular (AV)  node → Purkinje fibers → cardiocyte in LV
B)  atrioventricular (AV)  node → Purkinje fibers → atrioventricular (AV)  bundle → sinoatrial (S
A)   node → cardiocyte in LV
C)  atrioventricular (AV)  node → sinoatrial (S
A)   node → atrioventricular (AV)  bundle → Purkinje fibers → cardiocyte in LV
D)  sinoatrial (S
A)   node → atrioventricular (AV)  node → atrioventricular (AV)  bundle → Purkinje fibers → cardiocyte in LV
E)  sinoatrial (S
A)   node → atrioventricular (AV)  node → Purkinje fibers → atrioventricular (AV)  bundle → cardiocyte in LVF) D) and E)
G) A) and B)

Question 5

The systemic circuit contains oxygen-rich blood only.

Accepted Answer

A) True 
 B)False

Question 6

This figure shows the principal coronary blood vessels.Which one is the left coronary artery (LCA) ?

Accepted Answer

A)  11
B)  8
C)  5
D)  3
E)  1F) A) and E)
G) A) and D)

Question 7

This figure shows the internal anatomy of the heart.What blood vessel(s)  receive(s)  blood from the right ventricle?

Accepted Answer

A)  8
B)  3 and 5
C)  4 and 8
D)  1
E)  2 and 7F) D) and E)
G) A) and C)

Question 8

This figure shows electrical activity of the SA node.indicate(s)  when calcium enters the myocytes.

Accepted Answer

A)  1 and 2
B)  2 and 3
C)  3
D)  2
E)  1F) A) and B)
G) A) and E)

Question 9

Endurance athletes commonly have a resting heart rate as low as 40 bpm, and a stroke volume as low
as 50 mL/beat.

Accepted Answer

A) True 
 B)False

Question 10

Most of the ventricle filling occurs

Accepted Answer

A)  during atrial systole.
B)  when the AV valve is closed.
C)  during ventricular systole.
D)  during atrial diastole.
E)  during isovolumetric contraction.F) A) and B)
G) C) and D)

Question 11

belong to the pulmonary circuit.

Accepted Answer

A)  Aorta and venae cavae
B)  Aorta and pulmonary veins
C)  Pulmonary arteries and venae cavae
D)  Venae cavae and pulmonary veins
E)  Pulmonary arteries and pulmonary veinsF) A) and C)
G) A) and B)

Question 12

This figure shows the internal anatomy of the heart.What blood vessels carry blood to the lungs?

Accepted Answer

A)  only 3 and 5
B)  only 6, 7, and 2
C)  only 4, 6, and 8
D)  only 1 and 6
E)  only 3, 5, and 6F) D) and E)
G) All of the above

Question 13

Obstruction of the will cause a more severe myocardial infarction (MI)  than the obstruction of any of the others.

Accepted Answer

A)  left marginal vein
B)  left coronary artery (LC
A)  
C)  posterior interventricular vein
D)  anterior interventricular branch
E)  circumflex branchF) A) and B)
G) D) and E)

Question 14

Cardioinhibitory centers in the receive input from .

Accepted Answer

A)  cortex; proprioceptors in the muscles
B)  thalamus; chemoreceptors in the medulla oblongata
C)  hypothalamus; proprioceptors in the joints
D)  medulla oblongata; chemoreceptors in the aortic arch
E)  pons; baroreceptors in the internal carotidF) C) and E)
G) A) and E)

Question 15

If the SA node is damaged, nodal rhythm is sufficient to sustain life.

Accepted Answer

A) True 
 B)False

Question 16

After entering the right atrium, the furthest a red blood cell can travel is the

Accepted Answer

A)  right ventricle.
B)  pulmonary trunk.
C)  superior vena cava.
D)  ascending aorta.
E)  left atrium.F) A) and E)
G) C) and E)

Question 17

Ventricular pressure increases the fastest during ventricular filling.

Accepted Answer

A) True 
 B)False

Question 18

is the most superficial layer enclosing the heart.

Accepted Answer

A)  Parietal pericardium
B)  Visceral pericardium
C)  Endocardium
D)  Epicardium
E)  MyocardiumF) A) and B)
G) A) and C)

Question 19

Any abnormal cardiac rhythm is called a(n)

Accepted Answer

A)  ectopic focus.
B)  sinus rhythm.
C)  nodal rhythm.
D)  heart block.
E)  arrhythmia.F) A) and E)
G) A) and D)

Question 20

The ventricles are almost empty at the end of ventricular diastole.

Accepted Answer

A) True 
 B)False

Exam 19: The Circulatory System: Heart

Any abnormal cardiac rhythm is called a(n)

Correct AnswerverifiedShow Answer

Ventricular pressure increases the fastest during ventricular filling.

Correct AnswerverifiedShow Answer

The systemic circuit contains oxygen-rich blood only.

Correct AnswerverifiedShow Answer

Most of the ventricle filling occurs

Correct AnswerverifiedShow Answer

During isovolumetric contraction, the pressure in the ventricles

Correct AnswerverifiedShow Answer

This figure shows the internal anatomy of the heart.What blood vessel(s) receive(s) blood from the right ventricle?

Correct AnswerverifiedShow Answer

is the most superficial layer enclosing the heart.

Correct AnswerverifiedShow Answer

Cardioinhibitory centers in the receive input from .

Correct AnswerverifiedShow Answer

This is the correct path of an electrical excitation from the pacemaker to a cardiocyte in the left ventricle (LV) .

Correct AnswerverifiedShow Answer

The ventricles are almost empty at the end of ventricular diastole.

Correct AnswerverifiedShow Answer

If the SA node is damaged, nodal rhythm is sufficient to sustain life.

Correct AnswerverifiedShow Answer

Oxygen-poor blood passes through

Correct AnswerverifiedShow Answer

Obstruction of the will cause a more severe myocardial infarction (MI) than the obstruction of any of the others.

Correct AnswerverifiedShow Answer

belong to the pulmonary circuit.

Correct AnswerverifiedShow Answer

Opening and closing of the heart valves is caused by

Correct AnswerverifiedShow Answer

This figure shows the principal coronary blood vessels.Which one is the left coronary artery (LCA) ?

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After entering the right atrium, the furthest a red blood cell can travel is the

Correct AnswerverifiedShow Answer

This figure shows the internal anatomy of the heart.What blood vessels carry blood to the lungs?

Correct AnswerverifiedShow Answer

This figure shows electrical activity of the SA node.indicate(s) when calcium enters the myocytes.

Correct AnswerverifiedShow Answer

Endurance athletes commonly have a resting heart rate as low as 40 bpm, and a stroke volume as low as 50 mL/beat.

Correct AnswerverifiedShow Answer

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