is used in analysis of glomerular filtration rate
. It is not naturally found in the body
, is non-toxic
, and is usually infused
rather than, say, taken orally
The reason it is used in this sort of analysis is that it is freely filtered by the kidneys, and is neither reabsorbed, nor secreted.
The equation used to find the GFR is
GFR = (U * V) / P
is equal to the urine inulin
concentration times the volume flow
of urine, divided by the plasma
Finally, make sure you don't confuse inulin with insulin.
These are my interpretation of my lecture notes, but I may have used some references from Hole's Anatomy and Physiology (Shier, Butler, Lewis) and Human Physiology (Vander, Sherman, Luciano)