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How much glomerular filtrate do healthy kidneys produce each day?

  1. 120 litres

  2. 150 litres

  3. 180 litres

  4. 200 litres

The correct answer is: 180 litres

Healthy kidneys produce approximately 180 liters of glomerular filtrate each day. This process is an essential part of kidney function, where the glomeruli—tiny filtering units within the kidneys—filter blood to form filtrate, which then becomes urine after reabsorption and secretion processes. The production of this volume of filtrate indicates the kidneys' efficiency in filtering out waste products, excess substances, and maintaining fluid and electrolyte balance in the body. Although a significant amount of this filtrate is reabsorbed back into the bloodstream (typically around 99%), the initial production is a crucial indicator of kidney health. Understanding this volume can help healthcare professionals gauge renal function and monitor for any potential issues in patients, particularly in nephrology nursing where measuring kidney performance is crucial for managing various kidney-related conditions.