Glomerular filtration rate (GFR) increased by 20% as a result of prolonged starvation of an individual. The most evident cause of filtration changes under this conditions is:

Answer options

1. Increase of filtration coefficient
2. Increase of renal plasma stream
3. Increase of systemic blood pressure
4. Increase of penetration of the renal filter
5. Decrease of oncotic pressure of blood plasma