Hypersecretion of growth hormone in adults does not cause further increase in height because:
Correct answer: A. Epiphyseal plates close after adolescence
- A. Epiphyseal plates close after adolescence
- B. Bones loose their sensitivity to growth hormone in adults
- C. Muscle fibres do not grow in size after birth
- D. Growth hormone becomes inactive in adults
Explanation
Epiphyseal plate is a hyaline cartilage plate in the metaphysis at each end of long bone. It is part of long bone where new bone growth takes place until puberty .When the plate ossifies and fuses into the epiphyseal line the growth of bone stops. In adults, elevated levels of GH results in acromegaly where no increase in height occurs because of ossified epiphyseal plate .Instead bones grow in thickness.
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