Selective reabsorption means that it is selected and the reabsorption refers to idea that the glomerulus filtrate will go back to the blood.
- Filtration happens in the bowman's capsule and the glumerulus filtrate will contain the molecule glucose (and many others e.g. water, salts, amino acids and urea).
- At the end of the nephron is urine and normally urine does not contain glucose.
- If you test and find glucose in your urine it is a condition known as diabetes.
- In the first (proximal) convoluted tubule glucose is removed and taken back to blood.