Question : Assertion: Immune response of old persons become weak. Reason: Thymus degenerates in old individuals.

Question : Assertion: Immune response of old persons become weak. Rea

1.	Question : Assertion: Immune response of old persons become weak. Reason: Thymus degenerates in old individuals.
Answer» Solution :Thymus plays a major role in the development of the IMMUNE system. This gland secretes the peptide HORMONES called thymosins. Thymosins play a major role in the differentitation of T-lymphocytes, which PROVIDE cell-mediated immunity In addition, thymosins also promote production of antibodies to provide humoral immunity Thymus id DEGENERATED in old INDIVIDUALS resulting in a decreased production of thymosins. As a result, the immune responses of old persons become weak.