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HESI LPN · HESI LPN Medical Surgical Nursing · HESI NCLEX RN Questions on Respiratory System

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

The ________ circulation picks up oxygen for cellular use and drops off carbon dioxide for removal from the body.

A. pulmonary

B. interlobular

C. respiratory

D. bronchial

Expert Explanatory Rationale

Correct Answer: pulmonary

Question 2 of 5

The surface area of the alveoli is about

A. 80 m2

B. 70m2

C. 60m2

D. 90m2

Expert Explanatory Rationale

Correct Answer: 80 m2

Question 3 of 5

Under quiet conditions, blood returning to the heart retains about ________ of its oxygen content.

A. 25 percent

B. 50 percent

C. 75 percent

D. 90 percent

Expert Explanatory Rationale

Correct Answer: 75 percent

Question 4 of 5

Which of the following lymphocytes are involved in innate immunity?

A. natural killer (NK) cells

B. plasma cells

C. CD8 T cells

D. B memory cells

Expert Explanatory Rationale

Correct Answer: natural killer (NK) cells

Question 5 of 5

While assessing an acutely ill patient's respiratory rate, the nurse assesses four normal breaths followed by an episode of apnea lasting 20 seconds. How should the nurse document this finding?

A. Eupnea

B. Apnea

C. Biot's respiration

D. Cheyne-Stokes

Expert Explanatory Rationale

Correct Answer: Biot's respiration

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