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Ultrafiltration occurs in:

Correct answer: A. Bowman's capsule

  • A. Bowman's capsule
  • B. Proximal convoluted tube
  • C. Henle's loop
  • D. Distal convoluted tube

Explanation

Ultrafiltration occurs in Bowman's capsule, which is the initial segment of the nephron in the kidney. This structure contains a network of capillaries called the glomerulus, where blood pressure forces small molecules and ions through the capillary walls and into the Bowman's capsule. This process is the first step in urine formation and is responsible for filtering waste products from the blood.

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About Homeostasis

Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.

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