Which cells are elevated in viral infections?

Correct Answer: B

Rationale: Lymphocytes rise in viral infections; neutrophils are bacterial, eosinophils are parasites, basophils are allergies.

Correct Answer: B

Rationale: Lymphangitis is inflammation of lymph vessels, appearing as red lines; lymphadenitis is lymph node inflammation, lymphedema is swelling.

Correct Answer: D

Rationale: White pulp is round/oval, has four zones (including PALS), and a central arteriole.

Correct Answer: C

Rationale: Thymus has a dark cortex , pale medulla with Hassall's corpuscles (B, D); white/red pulp is spleen-specific (C is incorrect).

Correct Answer: B

Rationale: Splenic sinusoids are lined with elongated endothelial cells with large spaces ; Kupffer cells are in liver , stave cells line sinusoids (C is misphrased), basement membranes are discontinuous .