A man presents with glomerular filtration rate of 180 ml/min., while norm is 125±25 ml/min. The likely cause of it is the decreased:

Answer options

1. Hydrostatic blood pressure in the glomerular capillaries
2. Effective filtration pressure
3. Permeability of the renal filter
4. Plasma oncotic pressure
5. Renal blood flow

Explanation

Oncotic pressure pulls fluid into the capillaries. In conditions where plasma proteins are reduced, e.g. from being lost in the urine (proteinuria) or from malnutrition, there will be a reduction in oncotic pressure and an increased infiltration across the capillary.