question_answer 53)

  Dwarfism results due to (a) Excess secretion of thyroxin        (b) Less secretion of growth hormone (c) Less secretion of adrenaline        (d) Excess secretion of growth hormone

Answer:

                    (b) Deficiency of growth hormone in childhood causes dwarfism while excessive secretion causes gigantism. Deficiency of thyroxin causes goitre. Adrenaline is secreted in small amounts all the time but is secreted in large amounts to prepare our body for action during flight or fight.