The following are examples of lymphoid tissues EXCEPT

Correct Answer: D

Rationale: Lymphoid tissues produce or house immune cells, supporting immunity. 'Islets of Langerhans,' is correct as the exception, being pancreatic endocrine structures for hormone production (e.g., insulin), per histology texts like Ross and Pawlina, not lymphoid. 'Adenoids,' are pharyngeal lymphoid aggregates. 'Bone marrow,' generates lymphocytes, a primary lymphoid organ. 'Peyer's patches,' are gut-associated lymphoid tissues. Islets' endocrine role contrasts with the immune functions of adenoids, marrow, and patches, making D the precise answer, excluding it from lymphoid classification.

Correct Answer: B

Rationale: Under anaerobic conditions, carbohydrate metabolism (glycolysis) produces lactic acid in humans when oxygen is scarce. 'Lactic acid,' is correct, per biochemistry texts like Voet, accumulating in muscles during intense exercise. 'Carbon dioxide,' and 'Water,' are aerobic respiration products. 'Acetyl CoA,' feeds the Krebs cycle aerobically. Lactic acid's formation in anaerobic glycolysis distinguishes B as the accurate answer.

Correct Answer: C

Rationale: The liver detoxifies, produces bile, and synthesizes proteins, but insulin secretion is pancreatic. 'Insulin secretion,' is correct as the exception, per physiology (e.g., Vander). 'Detoxification,' neutralizes toxins. 'Bile production,' aids digestion. 'Protein synthesis,' includes albumin. Insulin's endocrine pancreatic origin distinguishes C as the accurate answer.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.