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HESI LPN · HESI LPN Medical Surgical Nursing · HESI Questions About the Respiratory System

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

Which muscles are involved in the initiation of inspiration?

A. Diaphragm and external intercostal muscles

B. Diaphragm and internal intercostal muscles

C. External intercostal muscles and abdominal muscles

D. Internal intercostal muscles and abdominal muscles

Expert Explanatory Rationale

Correct Answer: Diaphragm and external intercostal muscles

Question 2 of 5

The oxygen toxicity is related to _________

A. Blood poisoning

B. Failure of ventilation of lungs

C. Collapsing of the alveolar wall

D. Improper functioning of alveoli

Expert Explanatory Rationale

Correct Answer: Failure of ventilation of lungs

Question 3 of 5

The nurse recognizes that a rising PaCO2 level in a COPD patient means that:

A. There is more arterial oxygen available than is needed.

B. The ventilation-perfusion ratio is becoming balanced.

C. Respiratory acidosis has begun.

D. The anticholinergics are effective.

Expert Explanatory Rationale

Correct Answer: Respiratory acidosis has begun.

Question 4 of 5

A nurse is caring for a client using oxygen while in the hospital. What assessment finding indicates that outcomes for client safety with oxygen therapy are being met?

A. 100% of meals being eaten by the client

B. Intact skin behind the ears

C. The client understanding the need for oxygen

D. Unchanged weight for the past 3 days

Expert Explanatory Rationale

Correct Answer: Intact skin behind the ears

Question 5 of 5

The entry of food into the respiratory tract is checked by:

A. Pharynx

B. Epiglottis

C. Diaphragm

D. Larynx

Expert Explanatory Rationale

Correct Answer: Epiglottis

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