During hyperpnea:

Correct Answer: D

Rationale: Hyperpnea (deep breathing) requires active inspiration (diaphragm, external intercostals) and expiration (internal intercostals, abdominals).

Correct Answer: A

Rationale: Duodenal ulcers typically occur within 3 cm of the pylorus, commonly on both anterior and posterior walls, due to acid exposure and Helicobacter pylori infection.

Correct Answer: A

Rationale: Crohn's disease is characterized by transmural inflammation often leading to fistulas, with skip lesions rather than continuous involvement.

Correct Answer: D

Rationale: The d-xylose test assesses small bowel absorption, not pancreatic function, unlike the other tests which evaluate pancreatic enzyme output or damage.

Correct Answer: D

Rationale: All listed conditions "insulinoma, alcohol-induced glycogen depletion, postprandial hyperinsulinism, and paraneoplastic effects "can cause hypoglycemia.