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Chemical Coordination and Integration
Question
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Which endocrine gland becomes inactive in old age

  • Adrenal

  • Thymus

  • Pineal

  • Pituitary

Answer

B.

Thymus

A critical immune organ called the thymus shrinks rapidly with age, putting older individuals at greater risk for life-threatening infections. A new study reveals that thymus atrophy may stem from a decline in its ability to protect against DNA damage from free radicals. The damage accelerates metabolic dysfunction in the organ, progressively reducing its production of pathogen-fighting T cells.

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