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Chemical Coordination and Integration
Question
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The most accepted theory of ageing is :

  • less RBC in blood

  • thymus gland becomes non-functional

  • brain cells die with ageing

  • all of the above

Answer

B.

thymus gland becomes non-functional

Ageing is a progressive deterioration in structure and function of cells and tissues with age. According to the immunity theory of ageing due to decline of thymus, immunity decreases resulting in more diseases, damage and destruction of cells and tissues.

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