PATHOPHYSIOLOGY CARDIOVASCULAR QUESTIONS
WITH DETAILED VERIFIED AND 100% ACCURATE
ANSWERS
Which of the following actions causes the atrioventricular (AV) valves
to close?
A. Increased intraventricular pressure
B. Depolarization at the AV node
C. Ventricular relaxation and backflow of blood
D. Contraction of the atria Correct Answers A. Increased
intraventricular pressure
When stroke volume decreases, which of the following could maintain
cardiac output?
A. Decreased peripheral resistance
B. Increased heart rate
C. Decreased venous return
D. General vasodilation Correct Answers B. Increased heart rate
Which of the following describes the pericardial cavity?
A. It contains sufficient fluid to provide a protective cushion for the
heart.
B. It is a potential space containing a very small amount of serous fluid.
C. It is lined by the endocardium.
,D. It is located between the double-walled pericardium and the
epicardium. Correct Answers B. It is a potential space containing a very
small amount of serous fluid.
Which of the following factors greatly improves venous return to the
heart during strenuous exercise?
A. Rapid emptying of the right side of the heart
B. Forceful action of the valves in the veins
C. Contraction and relaxation of skeletal muscle
D. Peristalsis in the large veins Correct Answers C. Contraction and
relaxation of skeletal muscle
The function of the baroreceptors is to:
A. stimulate the parasympathetic or sympathetic nervous system at the
sinoatrial (SA) node as needed.
B. adjust blood pressure by changing peripheral resistance.
C. sense a change in blood oxygen and carbon dioxide levels.
D. signal the cardiovascular control center of changes in systemic blood
pressure. Correct Answers D. signal the cardiovascular control center of
changes in systemic blood pressure.
The normal delay in conduction through the AV node is essential for:
A. preventing an excessively rapid heart rate.
B. limiting the time for a myocardial contraction.
C. allowing the ventricles to contract before the atria.
,D. completing ventricular filling. Correct Answers D. completing
ventricular filling.
Which of the following is a result of increased secretion of epinephrine?
A. Increased heart rate and force of contraction
B. Decreased stimulation of the SA node and ventricles
C. Vasoconstriction in skeletal muscles and kidneys
D. Vasodilation of cutaneous blood vessels Correct Answers A.
Increased heart rate and force of contraction
Which of the following causes increased heart rate?
A. Stimulation of the vagus nerve
B. Increased renin secretion
C. Administration of beta-blocking drugs
D. Stimulation of the sympathetic nervous system Correct Answers D.
Stimulation of the sympathetic nervous system
The event that causes the QRS wave on an electrocardiogram (ECG)
tracing is:
A. atrial depolarization.
B. atrial repolarization.
C. ventricular depolarization.
D. ventricular repolarization. Correct Answers C. ventricular
depolarization.
, The cardiac reserve is:
A. afterload.
B. the difference between the apical and radial pulses.
C. the ability of the heart to increase cardiac output when needed.
D. the extra blood remaining in the heart after it contracts. Correct
Answers C. the ability of the heart to increase cardiac output when
needed.
The term preload refers to:
A. volume of venous return.
B. peripheral resistance.
C. stroke volume.
D. cardiac output. Correct Answers A. volume of venous return.
The first arteries to branch off the aorta are the:
A. common carotid arteries.
B. pulmonary arteries.
C. coronary arteries.
D. subclavian arteries. Correct Answers C. coronary arteries.
Cardiac output refers to:
A. the amount of blood passing through either of the atria.
B. the volume of blood ejected by a ventricle in one minute.
WITH DETAILED VERIFIED AND 100% ACCURATE
ANSWERS
Which of the following actions causes the atrioventricular (AV) valves
to close?
A. Increased intraventricular pressure
B. Depolarization at the AV node
C. Ventricular relaxation and backflow of blood
D. Contraction of the atria Correct Answers A. Increased
intraventricular pressure
When stroke volume decreases, which of the following could maintain
cardiac output?
A. Decreased peripheral resistance
B. Increased heart rate
C. Decreased venous return
D. General vasodilation Correct Answers B. Increased heart rate
Which of the following describes the pericardial cavity?
A. It contains sufficient fluid to provide a protective cushion for the
heart.
B. It is a potential space containing a very small amount of serous fluid.
C. It is lined by the endocardium.
,D. It is located between the double-walled pericardium and the
epicardium. Correct Answers B. It is a potential space containing a very
small amount of serous fluid.
Which of the following factors greatly improves venous return to the
heart during strenuous exercise?
A. Rapid emptying of the right side of the heart
B. Forceful action of the valves in the veins
C. Contraction and relaxation of skeletal muscle
D. Peristalsis in the large veins Correct Answers C. Contraction and
relaxation of skeletal muscle
The function of the baroreceptors is to:
A. stimulate the parasympathetic or sympathetic nervous system at the
sinoatrial (SA) node as needed.
B. adjust blood pressure by changing peripheral resistance.
C. sense a change in blood oxygen and carbon dioxide levels.
D. signal the cardiovascular control center of changes in systemic blood
pressure. Correct Answers D. signal the cardiovascular control center of
changes in systemic blood pressure.
The normal delay in conduction through the AV node is essential for:
A. preventing an excessively rapid heart rate.
B. limiting the time for a myocardial contraction.
C. allowing the ventricles to contract before the atria.
,D. completing ventricular filling. Correct Answers D. completing
ventricular filling.
Which of the following is a result of increased secretion of epinephrine?
A. Increased heart rate and force of contraction
B. Decreased stimulation of the SA node and ventricles
C. Vasoconstriction in skeletal muscles and kidneys
D. Vasodilation of cutaneous blood vessels Correct Answers A.
Increased heart rate and force of contraction
Which of the following causes increased heart rate?
A. Stimulation of the vagus nerve
B. Increased renin secretion
C. Administration of beta-blocking drugs
D. Stimulation of the sympathetic nervous system Correct Answers D.
Stimulation of the sympathetic nervous system
The event that causes the QRS wave on an electrocardiogram (ECG)
tracing is:
A. atrial depolarization.
B. atrial repolarization.
C. ventricular depolarization.
D. ventricular repolarization. Correct Answers C. ventricular
depolarization.
, The cardiac reserve is:
A. afterload.
B. the difference between the apical and radial pulses.
C. the ability of the heart to increase cardiac output when needed.
D. the extra blood remaining in the heart after it contracts. Correct
Answers C. the ability of the heart to increase cardiac output when
needed.
The term preload refers to:
A. volume of venous return.
B. peripheral resistance.
C. stroke volume.
D. cardiac output. Correct Answers A. volume of venous return.
The first arteries to branch off the aorta are the:
A. common carotid arteries.
B. pulmonary arteries.
C. coronary arteries.
D. subclavian arteries. Correct Answers C. coronary arteries.
Cardiac output refers to:
A. the amount of blood passing through either of the atria.
B. the volume of blood ejected by a ventricle in one minute.
