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Chemical Coordination and integration — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYChemical Coordination and integration1 Mark
MCQ
The immune system becomes weak in older persons. Which of the following is a cause for this?
  • A
    Increased secretion of thymus.
  • ✓
    Decreased secretion of thymus.
  • C
    Increased secretion of thyroid hormone.
  • D
    Decreased secretion of thyroid hormone.
✓

Answer

Correct option: B.
Decreased secretion of thymus.

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