As a result of continuous starvation the glomerular filtration rate has increased by 20%. The most probable cause of the glomerular filtration alteration under the mentioned conditions is:

Answer options

1. Increase of the renal blood flow
2. Decrease in the oncotic pressure of blood plasma
3. Increase in the permeability of the renal filter
4. Increase of the filtartion quotient
5. Increase in the systemic arterial pressure