The spleen is involved in immune defense, particularly against bloodborne pathogens. Which term describes the process of removing damaged or old blood cells from circulation in the spleen?

Correct Answer: B

Rationale: Hemolysis in the spleen removes damaged blood cells.

Correct Answer: C

Rationale: IgE triggers allergic responses via mast cells.

Correct Answer: C

Rationale: Titer measures antibody concentration in plasma.

Correct Answer: A

Rationale: Naïve B cells express IgM and IgD ; IgG (B, D) and IgA are post-activation.

Correct Answer: C

Rationale: IgE mediates allergies via mast cells; IgA , IgD , IgG , and IgM have other roles.