Question

mention the purpose of formation of urine

Answer 1

Urine process in human occurs by process of filtration, reabsorption and tubular secretion. In filtration, glomeruli act as filters, passes water, glucose, salt and waste materials to Bowman’s capsule but prevent RBC to pass. Reabsorption occurs in proximal tubule of nephron. Water, glucose, amino acids, sodium and other nutrients are reabsorbed into bloodstream. Water moves from high concentration to low concentration, process is osmosis. Secretion is final step in which substances move directly from blood in distal and collecting tubules. Maintain pH, acid-base balance by secreting hydrogen ions. When blood is acidic more ions are secreted and less when alkaline. Urine formed by these processes passes to central part of kidney called pelvis, then flows to ureter and bladder.

Answer 2

Urine is a concentrated liquid form of waste and is needed to be out of body in every three hours because it consists waste of body and casues pressure on urinary bladder which can make it burst and urine also help to out toxic substances.