The lymphatic system is a critical component of the immune system. Which of the following best describes its role in immunity?

Correct Answer: C

Rationale: It filters lymph/blood and activates immune responses.

Correct Answer: C

Rationale: IgA is found in secretions like milk and saliva.

Correct Answer: A

Rationale: Cytotoxic T cells attack foreign tissue in rejection.

Correct Answer: B

Rationale: T cells are 60-70% ; B cells are 10-20% , neutrophils are not lymphocytes , and plasma cells are rare .

Correct Answer: C

Rationale: Epitope is the recognized antigen part; allotype is allelic variation, idiotype is antibody uniqueness, isotype is class, and agretype is not a term.