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GCSE Biology · key term
The first coiled section of the nephron tubule after Bowman’s capsule, where glucose is reabsorbed.
Used by Edexcel and OCR
Specification 7.19B · Paper 2
Revise: Selective Reabsorption in the NephronFiltrate flows from Bowman’s capsule into the proximal convoluted tubule. Glucose moves through the cells lining this tubule and back into nearby blood capillaries. It is reabsorbed by active transport, which uses energy released by respiration and can move glucose against its concentration gradient.
Specification B3.3h · Paper 1 (Foundation), Paper 3 (Higher)
The first coiled section of tubule after Bowman’s capsule.
To explain why glucose is normally absent from urine, include both that it enters the filtrate during filtration and that it is reabsorbed in the proximal convoluted tubule.
Trace the tubule in order. Bowman’s capsule comes before the proximal convoluted tubule; the loop of Henlé dips into the medulla before the pathway reaches a collecting duct.
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From there it passes into the proximal convoluted tubule. Proximal means near the start, while convoluted describes its coiled shape; this part also lies in the cortex.