Identify the odd one in each of the following and mention what the rest are:

(a) Larynx; glucagon; testosterone; prolactin..............

(b) Adrenaline; penicillin; insulin; thyroxin................

(c) Stomach; ileum; liver; adrenaline...........................

(d) TSH; GH; ADH; insulin. ....................................

(e) Iodine, cretinism, goitre, myxoedema. ..........................

(a) Odd- Larynx

Rest are hormones.

Explanation: Larynx or voice box is a part of the respiratory system whereas glucagon, testosterone, prolactin are hormones secreted by different endocrine glands. Glucagon is secreted by the pancreas, testosterone by testes, prolactin by the anterior lobe of pituitary gland.

(b) Odd – Penicillin

Rest is Hormones.

Explanation: Penicillin is an antibiotic produced from fungus Penicillium notatum whereas the rest are hormones. Adrenaline is produced by the adrenal gland, insulin by pancreas and thyroxin by thyroid glands.

(c) Odd - Adrenaline

Rest are parts of the digestive system.

Explanation: Adrenaline is a hormone produced by adrenal glands during emergency situation whereas rest are parts of the digestive system.

(d) Odd – Insulin

Rest are hormones secreted by the pituitary gland.

Explanation: Insulin is secreted by beta cells of Islets of Langerhans present in the pancreas which promotes glucose utilization by body cells. But rest hormones are secreted by pituitary glands.

(e) Odd – Iodine

Rest are conditions which occur due to hyposecretion of thyroxin from the thyroid gland.

Explanation: Iodine is an essential element required for proper secretion of thyroxin and goitre, myxoedema, cretinism are the conditions which are caused due to undersecretion of thyroxin.