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OCR A Biology

Tubule Reabsorbed Active Transport Blood Conc Filtrate Proximal

Front proximal convoluted tubule
Back
  • All glucose, AA, vitamins and hormones reabsorbed via active transport, most NaCl and water also reabsorbed (Na+ actively, H20 and Cl- passively) into blood down steep conc gradient, cells lining this tubule has adaptations; covered by microvilli, which inc SA for reabsorption and has lots of mito to provide ATP for active transport, so most filtrate now reabsorbed.
  • filtrate reaching loop of henle has same conc as tissue fluid surrounding tubules and as blood plasma

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