NEET Zoology Excretion in Other Organs MCQ Question
Other than the kidneys, lungs, liver and skin also help in the elimination of excretory wastes. How many given statements are not true?
(i) Our lungs remove large amounts of CO₂ 200 ml/min and also significant quantities of water every day.
(ii) Liver, the largest gland in our body, secretes bile-containing substances like bilirubin, biliverdin, cholesterol, degraded steroid hormones, vitamins and drugs.
(iii) The sweat and sebaceous glands in the skin can eliminate certain substances through their secretions.
(iv) Sweat produced by the sweat glands is a watery fluid containing NaCl, large amounts of urea, citric acid, etc.
(v) Primary function of sweat is to removal of some of the wastes mentioned above, it also facilitate a cooling effect on the body surface.
(vi) Sebaceous glands eliminate certain substances like sterols, hydrocarbons and waxes through sebum.
One
Two
Three
None of these
Correct Answer
Detailed Explanation
Statements (iv) and (v) are incorrect. Sweat contains mainly water and salts, not large amounts of urea or citric acid. The primary function of sweat is thermoregulation, not waste removal.
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