Zoology - Chemical Coordination and Integration Question with Solution | TestHub

Deficiency of iodine in our diet results in hypothyroidism and enlargement of the thyroid gland; the condition is called goitre. Hypothyroidism during pregnancy in mothers causes cretinism in children. In hyperthyroidism, the rate of synthesis and secretion of thyroid hormone increases leading to higher hormone levels than normal, which leads to exophthalmic goitre or Grave's disease. Calcitonin decreases but parathormone increases blood calcium level.