This is the paranasal sinus found between the eyes and the nose that extends backward into the skull

Correct Answer: A

Rationale: The ethmoid sinus (correct spelling: ethmoid) is located between the eyes and nose, extending backward into the skull, distinguishing it from other sinuses like the maxillary (below the eyes), frontal (above the eyes), and sphenoid (deeper in the skull).

Correct Answer: C

Rationale: An average adult typically requires about 2,000 calories daily, varying by activity level, age, and gender.

Correct Answer: C

Rationale: A specific gravity of 1.039 indicates concentrated urine, consistent with dehydration (normal range: 1.010-1.030).

Correct Answer: C

Rationale: Pernicious anemia, due to B12 deficiency, causes a beefy red tongue from glossitis.

Correct Answer: B

Rationale: Greater surface area increases the contact between gas and water, enhancing evaporation, which is a fundamental principle of humidifier function.