The hormone that controls the basal metabolic rate $(BMR)$ in our body is secreted by:

When is thyrocalcitonin secreted?

$I.$ Regulation of $BMR$
$II.$ Supports the process of $RBC$ formation
$III.$ Controls the metabolism of carbohydrates,proteins and fat
$IV.$ Maintenance of water and electrolyte balance
$V.$ Secretion of $TCT$ hormone
Functions written above belong to which of the following glands?

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A):$ During pregnancy,the level of thyroxine is increased in the maternal blood.
Reason $(R):$ Pregnancy is characterised by metabolic changes in the mother.
In the light of the above statements,choose the most appropriate answer from the options given below:

What are the effects of hypothyroidism (observed during pregnancy) on the development and maturation of a growing baby?

Which of the following diseases results from an endocrine disorder?