Q. 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.
Explanation
[Solution] After adolescence the epiphyseal (growth) plates fuse, so long bones cannot lengthen; excess GH causes acromegaly instead. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.