Question

Source of somatostatin is the same as that of

• A. Insulin and glucagon
• B. Vassopressin and oxytocin
• C. Thyroxine and calcitonin
• D. Somatotropin and prolactin

Answer 1

The correct option is A Insulin and glucagon

A. Insulin is secreted from the β cells of islets of Langerhans of pancreas. Insulin acts on hepatocytes and adipocytes and increases the uptake of cellular glucose and its utilisation. This leads to decreased blood glucose levels.

Glucagon is a peptide hormone. It is secreted from the αα-cells of islets of Langerhans in pancreas. It increases blood sugar level by acting on hepatocytes and stimulates breakdown of glycogen (Glycogenolysis) and synthesis of glucose from proteins and fats (Gluconeogenesis).

B. Vasopressin is secreted from the posterior part of pituitary gland. This hormone increases reabsorption of water in kidneys and this results in decreased rate of urine production.

Oxytocin is secreted from the posterior pituitary and helps in the contraction of uterus during childbirth and also stimulates release of milk from mammary glands i.e. lactation.

C. Thyroxine is secreted from thyroid gland. It stimulates the consumption of oxygen by metabolically active tissues and also increases the oxidation of glucose in tissues.

Calcitonin is secreted from the C-cells of thyroid gland and acts on bone and kidneys to reduce blood calcium level.

D. Somatotropin or Growth hormone is secreted from anterior part of pituitary gland and stimulates body growth and metabolism of carbohydrates, fats and proteins.

Prolactin, also known as lactogenic hormone is produced by the pituitary gland. This hormones stimulates the production of milk in mammary glands during pregnancy.

Somatostatin is produced by delta cells of pancreas and inhibits secretion of insulin and glucagon. Hence, its source is same as that of insulin and glucagon.

So, the correct answer is 'Insulin and glucagon'.