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In the nephron of man, what is the correct sequence of urine formation?

In the nephron of man, what is the correct sequence of urine formation? Correct Answer Ultrafiltration, selective reabsorption and tubular secretion

The correct answer is Ultrafiltration, selective reabsorption, and tubular secretion.

Key Points

​Urine formation process:

  • Each kidney has more than 1 million functional units called nephrons.
  • A nephron consists of a cuplike Bowman's capsule connected to a long, partially coiled renal tubule.
  • Thus, filtrate passes through the following structures- Bowman's capsule then proximal convoluted tubule then a loop of Henle to distal convoluted tubule to collecting duct.
  • Urine, the watery discharge of the urinary system, is produced by a combination of three processes - Ultrafiltration, followed by selective reabsorption, and then tubular secretion.

Important Points

  • Kidney
    • In humans, the kidney is one of the main organs of the excretory system.
    • The kidney's function is the filtration of the blood and removing waste(toxic) products.
    • Waste products and excess fluid are removed through the urine.
    • If the kidney fails a person needs to undergo dialysis.
    • Dialysis is a treatment that filters and purifies the blood using a machine. 

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