Urinary system

Please answer the following questions. The answers should be 5 lines each.

1.Describe the filtration membrane, its three parts and their characteristics.
2.Describe the pressures that promote and oppose glomerular filtration.
3.What is GFR? Discuss the three mechanisms that regulate /influence glomerular filtration rate.
4.Discuss tubular reabsorption in the proximal convoluted tubule. What is the importance of sodium  reabsorption as far as reabsorption of other solutes in concerned?
5.What are the substances that are secreted during the process of tubular secretion