The site and principal mechanism for the passage of glucose into the bloodstream in the human kidney is the:

Correct answer: E. Proximal convoluted tubule .... By active reabsorption

  • A. Collecting duct .... By active secretion
  • B. Distal convoluted tubule .... By passive diffusion
  • C. Glomerulus .... By selective reabsorption
  • D. Glomerulus .... By ultrafiltration
  • E. Proximal convoluted tubule .... By active reabsorption

Explanation

All the nutrients, including glucose, are absorbed back into the proximal convoluted tubule by active reabsorption. The glomerulus is not involved in absorption but just "ultrafiltration".DCT and Collecting ducts are primarily used to absorb water.

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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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