Question 1

In a physiology lab, the students designed an experiment to illustrate how the heart responds to changes in blood pressure. Everyone relaxed and then did a headstand. Which of the following observations are consistent with the change in the function of their hearts?

Accepted Answer

A)   increased heart rate
B)   decreased heart rate
C)   increased stroke volume
D)   decreased stroke volume
E)   both decreased heart rate and increased stroke volumeF) A) and E)
G) None of the above

Question 2

When comparing cardiac muscle cells and skeletal muscle cells,

Accepted Answer

A)   the rate of action potential propagation is faster in cardiac muscle.
B)   both possess intercalated discs.
C)   only skeletal muscle has a plateau phase in its contraction cycle.
D)   action potentials are conducted from cell to cell only in cardiac muscle.
E)   both are voluntary.F) All of the above
G) A) and E)

Question 3

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

Accepted Answer

A)   right atrium - pulmonary veins
B)   left atrium - aorta
C)   right ventricle - pulmonary trunk
D)   left ventricle - superior vena cava and inferior vena cava
E)   right atrium - aortaF) A) and B)
G) A) and C)

Question 4

Which of the following will increase the heart rate?

Accepted Answer

A)   a rise in pH
B)   an increase in the level of carbon dioxide in the blood
C)   an increase in the level of blood oxygen
D)   an increase in blood pressure
E)   a decrease in the level of carbon dioxide in the bloodF) A) and B)
G) C) and D)

Question 5

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

Accepted Answer

A)   attack.
B)   angina.
C)   necrosis.
D)   cirrhosis.
E)   infarction.F) A) and E)
G) C) and D)

Question 6

Which of the following sequences for the conducting system is correct?

Accepted Answer

A)   AV node, AV bundle, SA node, Purkinje fibers, bundle branches
B)   Purkinje fibers, bundle branches, AV node, AV bundle, SA node
C)   SA node, AV node, AV bundle, bundle branches, Purkinje fibers
D)   SA node, AV bundle, AV node, bundle branches, Purkinje fibers
E)   AV node, SA node, bundle branches, AV bundle, Purkinje fibersF) All of the above
G) None of the above

Question 7

The product of the stroke volume times the heart rate is known as the

Accepted Answer

A)   end-diastolic volume.
B)   end-systolic volume.
C)   cardiac output.
D)   cardiac reserve.
E)   venous return.F) B) and C)
G) A) and B)

Question 8

A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries are partially occluded. Which of the following is the best course of action to treat the disease?

Accepted Answer

A)   Angioplasty
B)   Coronary bypass surgery
C)   Electrocardiogram
D)   Tissue plasminogen activation
E)   AngiogramF) B) and E)
G) B) and D)

Question 9

Diagnostic tests done on a patient show that many coronary arteries, including the left main coronary artery are severely narrowed. Which of the following is the best course of action to treat this patient?

Accepted Answer

A)   Angiogram
B)   Angioplasty
C)   Coronary bypass surgery
D)   Electrocardiogram
E)   Urokinase injectionsF) D) and E)
G) A) and B)

Question 10

The chordae tendineae

Accepted Answer

A)   connect the atria to the ventricles.
B)   are found in the interventricular septum.
C)   are part of the conducting system of the heart.
D)   connect the flaps of the AV valves to the papillary muscles.
E)   are a part of the myocardium.F) C) and D)
G) B) and C)

Question 11

Which blood vessel carries blood from the left ventricle?

Accepted Answer

A)   aorta
B)   right atrium
C)   pulmonary trunk
D)   pulmonary arteries
E)   pulmonary veinsF) A) and E)
G) B) and E)

Question 12

The plateau phase seen during the action potential of a cardiac muscle cell is due to the

Accepted Answer

A)   sodium-potassium pump.
B)   opening of sodium channels.
C)   continuing to have open calcium channels.
D)   closure of chloride channels.
E)   closing of calcium channels.F) A) and B)
G) B) and E)

Question 13

Baroreceptor reflexes

Accepted Answer

A)   are triggered by increased blood osmolality.
B)   correct changes in blood pH.
C)   do not impact the activity of the heart.
D)   are of minor importance in humans.
E)   can change heart rate.F) A) and E)
G) A) and B)

Question 14

What vessel exits the left ventricle?

Accepted Answer

A)   pulmonary trunk
B)   pulmonary vein
C)   aorta
D)   pulmonary arteryE) None of the above
F) A) and B)

Question 15

Which of the following will depolarize immediately after the AV node depolarizes?

Accepted Answer

A)   the AV bundle
B)   Purkinje fibers
C)   atrial myocardium
D)   bundle branches in the ventricular septum
E)   the SA nodeF) A) and D)
G) B) and E)

Question 16

All of the following characteristics of the sarcoplasmic reticulum in cardiac muscle cells are true except ________________.

Accepted Answer

A)   it is more irregular than that in skeletal muscle cells.
B)   it is in close association wit the transverse tubules.
C)   it is involved in the storage and release of calcium
D)   it has enlarged terminal cisternae like skeletal muscle cells.E) B) and C)
F) A) and D)

Question 17

A stab wound into the heart can result in cardiac tamponade. This means that

Accepted Answer

A)   blood enters the pleural cavity.
B)   the heart is compressed by blood in the pericardial sac.
C)   the electrical conduction system of the heart is damaged.
D)   the left coronary artery has been damaged or cut.
E)   the heart has lost all of its blood.F) A) and E)
G) B) and E)

Question 18

Which of the following is NOT a function of the heart?

Accepted Answer

A)   providing a location for gas exchange between oxygen and carbon dioxide
B)   regulating blood supply to tissues depending on need
C)   generating blood pressure through contraction
D)   routing blood to either the pulmonary or systemic circulationsE) C) and D)
F) B) and C)

Question 19

The "pacemaker" of the heart is the

Accepted Answer

A)   right bundle branch.
B)   left bundle branch.
C)   AV node.
D)   SA node.
E)   PM node.F) B) and C)
G) A) and E)

Exam 20: Cardiovascular System: the Heart

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

Correct Answer
verified

Which of the following will depolarize immediately after the AV node depolarizes?

Correct Answer
verified

All of the following characteristics of the sarcoplasmic reticulum in cardiac muscle cells are true except ________________.

Correct Answer
verified

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

Correct Answer
verified

When comparing cardiac muscle cells and skeletal muscle cells,

Correct Answer
verified

The "pacemaker" of the heart is the

Correct Answer
verified

The plateau phase seen during the action potential of a cardiac muscle cell is due to the

Correct Answer
verified

What vessel exits the left ventricle?

Correct Answer
verified

Baroreceptor reflexes

Correct Answer
verified

Which of the following sequences for the conducting system is correct?

Correct Answer
verified

The chordae tendineae

Correct Answer
verified

A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries are partially occluded. Which of the following is the best course of action to treat the disease?

Correct Answer
verified

Which blood vessel carries blood from the left ventricle?

Correct Answer
verified

In a physiology lab, the students designed an experiment to illustrate how the heart responds to changes in blood pressure. Everyone relaxed and then did a headstand. Which of the following observations are consistent with the change in the function of their hearts?

Correct Answer
verified

The product of the stroke volume times the heart rate is known as the

Correct Answer
verified

A stab wound into the heart can result in cardiac tamponade. This means that

Correct Answer
verified

Which of the following is NOT a function of the heart?

Correct Answer
verified

Diagnostic tests done on a patient show that many coronary arteries, including the left main coronary artery are severely narrowed. Which of the following is the best course of action to treat this patient?

Correct Answer
verified

Which of the following will increase the heart rate?

Correct Answer
verified

Exam 20: Cardiovascular System: the Heart

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

Correct AnswerverifiedShow Answer

Which of the following will depolarize immediately after the AV node depolarizes?

Correct AnswerverifiedShow Answer

All of the following characteristics of the sarcoplasmic reticulum in cardiac muscle cells are true except ________________.

Correct AnswerverifiedShow Answer

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

Correct AnswerverifiedShow Answer

When comparing cardiac muscle cells and skeletal muscle cells,

Correct AnswerverifiedShow Answer

The "pacemaker" of the heart is the

Correct AnswerverifiedShow Answer

The plateau phase seen during the action potential of a cardiac muscle cell is due to the

Correct AnswerverifiedShow Answer

What vessel exits the left ventricle?

Correct AnswerverifiedShow Answer

Baroreceptor reflexes

Correct AnswerverifiedShow Answer

Which of the following sequences for the conducting system is correct?

Correct AnswerverifiedShow Answer

The chordae tendineae

Correct AnswerverifiedShow Answer

A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries are partially occluded. Which of the following is the best course of action to treat the disease?

Correct AnswerverifiedShow Answer

Which blood vessel carries blood from the left ventricle?

Correct AnswerverifiedShow Answer

In a physiology lab, the students designed an experiment to illustrate how the heart responds to changes in blood pressure. Everyone relaxed and then did a headstand. Which of the following observations are consistent with the change in the function of their hearts?

Correct AnswerverifiedShow Answer

The product of the stroke volume times the heart rate is known as the

Correct AnswerverifiedShow Answer

A stab wound into the heart can result in cardiac tamponade. This means that

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of the heart?

Correct AnswerverifiedShow Answer

Diagnostic tests done on a patient show that many coronary arteries, including the left main coronary artery are severely narrowed. Which of the following is the best course of action to treat this patient?

Correct AnswerverifiedShow Answer

Which of the following will increase the heart rate?

Correct AnswerverifiedShow Answer

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