Question
Biology Question on chemical coordination and integration
Acromegaly is caused by :-
A
Excess of S.T.H
B
Excess of Thyroxin
C
Deficiency of Thyroxin
D
Excess of Adrenalin
Answer
Excess of S.T.H
Explanation
Solution
The correct answer is A:Excess of S.T.H
Acromegaly is caused by excess of STH (somatotrophic hormone), released by anterior lobe of pituitary after adolescence. The bones of the lower jaw and limbs become abnormally enlarge but the body does not attain a giant stature. Excess of thyroxine causes cretinism and myxoedema. Excess of adrenaline causes increased BMR, heart beat, excitement etc.