What is the Glomerular Filtration Rate (GFR)? Discuss the physiological factors that can influence it.

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College Answer

Generally this question was well answered. Almost all answers gave the correct value for GFR 
and the correct formula for Starling’s forces across the glomerular membrane.
Better answers discussed the physiological factors affecting each force (hydrostatic and 
osmotic) across the membrane in a stepwise logical manner.
Some answers discussed the control of renal blood flow; this was not expected and therefore 
was not rewarded.