Question

Basal metabolic rate is under control of

• A. Glucagon
• B. Insulin
• C. Thyroxine
• D. Both A and B

Answer 1

Answer: (C)

Thyroxine

A. Glucagon is secreted from alpha cells of islets of Langerhans of pancreas. It increases blood sugar level by stimulating glycogenolysis (i.e. break down of glucose) and gluconeogenesis (synthesis of glucose).

B. 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 movement of glucose to hepatocytes and adipocytes from the blood, thereby resulting in the decreased blood glucose levels.

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. It controls Basal Metabolic Rate (BMR). BMR is the amount of energy needed to keep the body functioning at rest.

So, the correct answer is 'Thyroxine'.