Bone Growth · Histology

Which hormone is the most important stimulus for epiphyseal plate activity during childhood?

  1. Parathyroid hormone (PTH)
  2. Triiodothyronine (Thyroid hormone)
  3. Calcitonin (Thyrocalcitonin)
  4. Growth hormone (Somatotropin)
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Correct answer: Growth hormone (Somatotropin)

Growth hormone, acting largely through Insulin-like Growth Factor 1 (IGF-1), stimulates chondrocyte proliferation in the epiphyseal plate. Excessive growth hormone during childhood leads to gigantism.

Difficulty: Medium Question 17 of 20

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