The nephron factor.

Examines the mechanics of sodium retention by the kidney and shows by means of animations, microphotography and the use of the gamma camera with non-invasive radioactivity that it is the natural reaction of the cortical nephron which instigates possible damage. The film takes the form or a to-camera lecture by Dr. K. Britton with accompanying explainatory inserts. After the short end credit, there is a short infomercial about the product Lasipressin specifically developed to treat sodium retention.