State the 4 steps in ultrafiltration
1. Different lumen sizes of Afferent and Efferent arterioles creates a filtration pressure in glomerulus
2. Fluid passes through the basement membrane and gaps in the endothelium that act as a 1st filter
3. The podocytes in the Bowman's capsule wall act as a 2nd filter as they have pedicels that wrap around the capillaries. further stopping the entry of any RBCs, WBCs and large plasma proteins
4. The filtrate which enters the capsule contains glucose, water, salt (Na+, Cl-), urea, amino acids, hormones, vitamins