Renal Calculi Formation and Types — NEET Biology
✅ Asked in NEET 2018Renal calculi: Stone or insoluble mass of crystallised salts (oxalates, etc.) formed within the kidney.
Renal calculi (kidney stones) are insoluble crystalline masses formed from substances like oxalates, calcium phosphate, and uric acid that precipitate in the kidneys. NTA tests whether students can distinguish renal calculi from other kidney disorders like glomerulonephritis and understand their composition. The common mistake is confusing kidney stones with kidney infections or inflammation—remember, calculi are *crystalline deposits*, not microbial infections. To score correctly: know that they form when solutes concentrate beyond solubility limits, recognize oxalates as a major component, and understand that dehydration increases risk. This bridges excretion (waste handling) with urinary system pathology, making it a likely repeat topic.
Match the following: Column I A. Glycosuria B. Gout C. Renal calculi D. Glomerular nephritis Column II i. Accumulation of uric acid in joints ii. Mass of crystallised salts within the kidney iii. Inflammation in glomeruli iv. Presence of glucose in urine
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