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Question
Assertion :Immune response of old persons become weak. Reason: Thymus degenerates in old individuals.
Assertion :Immune response of old persons become weak. Reason: Thymus degenerates in old individuals.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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 differentiation of T-lymphocytes, which provide
cell-mediated immunity. In addition, thymosins also promote production
of antibodies to provide humoral immunity. Thymus is degenerated in old
individuals resulting in a decreased production of thymosins. As a
result, the immune response of old persons become weak.So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
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 differentiation of T-lymphocytes, which provide
cell-mediated immunity. In addition, thymosins also promote production
of antibodies to provide humoral immunity. Thymus is degenerated in old
individuals resulting in a decreased production of thymosins. As a
result, the immune response of old persons become weak.
So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
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