QUICKmedicine app

proximal convoluted tubule
You have 3 open access pages left.
UK healthcare workers and students can get FREE subscriptions... click here.

 
   

The glomerular filtrate passes first into the proximal convolute tubule. The reabsorption is essentially isotonic. Here energy dependent mechanisms reabsorb all of the following constituents:

  • glucose - this mechanism is saturated when the blood glucose is more than 10 mmol/l. When this level of blood glucose is reached then glycosuria occurs.
  • amino acids
  • potassium
  • sodium - about 80% reabsorbed
  • bicarbonate - there is titratable acid and ammonium secretion
  • active secretion also transports other compounds e.g. penicillins, probenecid

There is passive reabsorption of water and chloride.

Links: