Ultrafiltration, I. Diameter of afferent arteriole is larger than efferent arteriole (to produce high hydrostatic pressure in the glomerulus), II. Permeable to water and solute// Not permeable to blood cells and plasma protein // Porous capillaries, III. Highly-coiled (glomerulus) to increase surface area for ultrafiltration, Most protein molecules are large. They cannot be filtered out of the glomerulus/ They cannot pass through the glomerulus, All the glucose is reabsorbed (from proximal tubule into the blood capillaries by active transport), More water is reabsorbed. Urine volume decreases. Urine is more concentrated

Nephron 3

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