Question

Hormone responsible for aggressive behaviour of an animal is

• A. Adrenaline
• B. Thyroxine
• C. ADH
• D. Testosterone

Answer 1

Answer: (A)

Adrenaline

A. Adrenaline, also known as emergency hormone, is secreted from the adrenal medulla. This hormone is associated with maintenance of homeostasis in body and is secreted in response to any kind of stress or emergency in the body. It is responsible for aggressive behaviour of an animal.

B. Thyroxine hormone is secreted from thyroid gland and increases oxygen consumption by metabolically active tissues.

C. Anti diuretic hormone (ADH) or 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.

D. Testosterone is the male sex hormone secreted from testis and stimulates the development of secondary sexual characteristics in males.

So, the correct answer is 'Adrenaline'.