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ATI LPN · Medical Surgical Nursing · 100 Questions on the Cardiovascular System

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

During the cardiac cycle, the second heart sound is heard during:

A. ventricular contraction.

B. ventricular relaxation.

C. ejection.

D. passive ventricular filling.

Expert Explanatory Rationale

Correct Answer: ventricular relaxation.

Question 2 of 5

The greatest resistance to blood flow occurs in the:

A. arteries

B. arterioles

C. venules

D. capillaries

Expert Explanatory Rationale

Correct Answer: arterioles

Question 3 of 5

What is meant by the concept 'venous return mechanism'?

A. Venous return is the transport of blood from the capillaries, through venules, veins and venae cavae to the right atrium of the heart.

B. Venous return is aided by exercise due to increased actions of skeletal muscle and respiratory and cardiac pumps.

C. How is blood flow to various regions of the body controlled?

D. What effect does enhanced venous return have upon cardiac output and stroke volume?

Expert Explanatory Rationale

Correct Answer: Venous return is the transport of blood from the capillaries, through venules, veins and venae cavae to the right atrium of the heart.

Question 4 of 5

Coronary vessels are found in:

A. Endocardium

B. Epicardium

C. Myocardium

D. All of them

Expert Explanatory Rationale

Correct Answer: Epicardium

Question 5 of 5

Opioids are often utilized in patients in palliative settings. Which side effect is generally associated with their use in this patient population?

A. Diarrhea

B. Increased vigilance

C. Nausea

D. Dyspnea

Expert Explanatory Rationale

Correct Answer: Nausea

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