Question

Which of the following is incorrectly matched?

• A. Large intestine – Ammonia
• B. Skin – Sweat
• C. Lungs – Carbon dioxide
• D. Liver – Urea

Answer 1

The correct option is A Large intestine – Ammonia

Liver, lungs, and skin also play an important role in the process of excretion.
Role of the liver: Liver is the largest gland in the human body. It changes the decomposed haemoglobin pigment into bile pigments called bilirubin and biliverdin. It helps in the excretion of cholesterol, steroid hormones, vitamins, drugs, and other waste materials through bile. Urea is formed in the liver. Ammonia is quickly changed into urea in the liver and then eliminated from the body.
Role of the lungs: Lungs help in removing waste materials such as carbon dioxide and water as vapour in expired air.
Role of the skin: Skin has two types of glands that help in the excretion of waste products through sweat and sebaceous glands.
(i) Sweat glands help in thermoregulation.
(ii) Sebaceous glands secrete an oily secretion called sebum. It prevents the drying up of skin.
Large intestine plays a role in the removal of undigested food from the alimentary canal.