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easyMCQNEET 20172026Biology
4 marks (−1)

Hypersecretion of Growth Hormone in adults does not cause further increase in height, because:

  1. A
    Growth Hormone becomes inactive in adults
  2. B
    Epiphyseal plates close after adolescence
  3. C
    Bones loose their sensitivity to Growth Hormone in adults
  4. D
    Muscle fibres do not grow in size after birth

Solution & Step-by-step Explanation

Linear growth of long bones occurs at the epiphyseal plates (growth plates). After adolescence, these plates fuse and close under hormonal influence. Therefore, excessive Growth Hormone in adults cannot increase height (though it leads to acromegaly, the thickening of bones).

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Hypersecretion of Growth Hormone in adults does not cause further increase in height, because:
A
Growth Hormone becomes inactive in adults
B
Epiphyseal plates close after adolescence
C
Bones loose their sensitivity to Growth Hormone in adults
D
Muscle fibres do not grow in size after birth

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Human PhysiologyChemical Coordination

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