Which of the following describes the flow of lymph through a lymph node draining an infected tissue?

Correct Answer: C

Rationale: Lymph flows from afferent lymphatics into the node, then exits via efferent lymphatics, draining infection sites.

Correct Answer: D

Rationale: Superantigens nonspecifically overactivate T cells; not specific or enhancing .

Correct Answer: B

Rationale: Axillary lymph nodes drain the arm and mammary gland, not the scalp or viscera.

Correct Answer: A

Rationale: Antigen-presenting cells (e.g., macrophages) express MHC-II, not erythrocytes or muscle cells.

Correct Answer: D

Rationale: Lymphocytes include T and B cells, key to adaptive immunity, not erythrocytes or platelets.