Question

Cretinism is due to low levels of _______ secretions.

• A. Thyroid
• B. Pituitary
• C. Parathyroid
• D. Adrenal

Answer 1

The correct option is A Thyroid

A. Thyroid gland is situated between the trachea and larynx in the neck and secretes thyroxine hormone which increases oxygen consumption by metabolically active tissues.

B. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.

C. Parathyroid gland is present in the form of four small pouches which are embedded in the posterior surface of lobes of thyroid gland. This gland secretes parathormone which increases calcium reabsorption from the bones and causes mobilisation of calcium in the blood.

D. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids (Cortisol), mineralocorticoids (Aldosterone) and sexocorticoids (Androgen) and, adrenal medulla which secrete adrenaline and nor-adrenaline hormone.

Cretinism is the retarded mental and physical development due to hypersecretion of thyroid hormones.

So, the correct answer is 'Thyroid'.