Q.Name the three processes involved in Urine formation.

Urine formation in the kidney nephron proceeds through three sequential processes: glomerular filtration, tubular reabsorption, and tubular secretion.

Each nephron, the functional unit of the kidney, produces urine through three coordinated processes. First is glomerular filtration, which occurs at the Bowman's capsule/glomerulus, where blood pressure forces water and small solutes (glucose, amino acids, salts, urea, and other wastes) out of the glomerular capillaries into the capsular space, forming a filtrate while retaining blood cells and large proteins in the blood. Second is tubular reabsorption, which occurs as this filtrate passes along the proximal convoluted tubule, loop of Henle, and distal convoluted tubule; here, useful substances such as glucose, amino acids, most of the water, and needed ions are selectively reabsorbed back into the surrounding peritubular capillaries, so they are not lost from the body. Third is tubular secretion, in which certain additional substances not adequately removed by filtration — such as excess H+ ions, K …