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

Assertion: Immune response of old persons become weak. Reason: Thymus

1.	Assertion: Immune response of old persons become weak. Reason: Thymus degenerates in old individuals.
Answer» Correct Answer - A 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.

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

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