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HESI LPN · HESI LPN Medical Surgical Nursing · HESI Multiple Choice Questions About Respiratory System

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

The Hering-Breuer reflex

A. functions to increase ventilation with changes in blood pressure

B. alters pulmonary ventilation when the PO2 changes

C. alters pulmonary ventilation when the PCO2 changes

D. protects the lungs from damage due to overinflation

Expert Explanatory Rationale

Correct Answer: protects the lungs from damage due to overinflation

Question 2 of 5

A nurse in a medical unit is caring for a client with heart failure. The client suddenly develops extreme dyspnea,tachycardia and lung crackles. The nurse immediately asks another nurse to contact the primary health care provider and prepares to implement ALL priority interventions EXCEPT?

A. Administer oxygen

B. Administer furosemide (diuretic)

C. Transport to coronary care unit

D. Obtain stat Hepatic Panel

Expert Explanatory Rationale

Correct Answer: Transport to coronary care unit

Question 3 of 5

At a PO2 of 70 mm Hg and normal temperature and pH, hemoglobin is ________ percent saturated with oxygen.

A. 10

B. 25

C. 50

D. more than 90

Expert Explanatory Rationale

Correct Answer: more than 90

Question 4 of 5

When CO2 diffuses into blood in systemic capillaries most of it:

A. Remains in solution as CO2

B. Converts to carbamino compounds

C. Converts to bicarbonate ions in RBC

D. Combines with Hb directly

Expert Explanatory Rationale

Correct Answer: Converts to bicarbonate ions in RBC

Question 5 of 5

Pneumatic and inhibitory centers are associated with

A. Respiration

B. Breathing

C. Inspiration

D. Expiration

Expert Explanatory Rationale

Correct Answer: Breathing

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