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Thymosins, which act on the immune system, are secreted by the
Athyroid
Bpancreas
Cpineal gland
Dthymus
Answer & Solution
Correct answer: D. thymus
1. The thymus is one of the endocrine glands listed here.
2. It secretes the peptide hormones called thymosins.
3. Thymosins play a major role in the differentiation of T lymphocytes.
4. That gives the immune system its cell mediated arm.
_Source: NCERT Class 11 Biology Ch19 'Chemical Coordination and Integration', section 19.2.6_
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