Liver, Lungs & Skin Excretion — NEET Biology

Correct answer: A — A-i-p, B-ii-r, C-iii-q, D-iv-s

The core concept is to link organs with their excretory roles and the physiological consequences of their dysfunction. - A. Liver: Secretes bile containing bilirubin, cholesterol, degraded steroid hormones (Column II: i). Impaired liver function can lead to accumulation of bilirubin (jaundice) and degraded steroid hormones (Column III: p). So, A-i-p. - B. Kidneys: Primarily responsible for the elimination of nitrogenous wastes like urea and regulation of ionic/water balance (Column II: ii). Malfunctioning of kidneys can lead to accumulation of urea in blood, a condition called uremia, which can also cause electrolyte imbalance and fluid overload (Column III: r). So, B-ii-r. - C. Lungs: Remove large amounts of CO2 and significant quantities of water vapour (Column II: iii). Impaired lung function can lead to accumulation of CO2 (hypercapnia) and consequent respiratory acidosis (Column III: q). So, C-iii-q. - D. Skin (Sweat glands): Excretes NaCl, small amounts of urea, and lactic acid (Column II: iv). Impaired sweat gland function would hinder thermoregulation leading to excessive body heat, and reduce the elimination of these specific wastes (Column III: s). So, D-iv-s. The correct match is A-i-p, B-ii-r, C-iii-q, D-iv-s. This question requires integrated understanding of excretory functions across multiple organs and the physiological impacts of their failure.