On the 6th day of treatment a patient with acute renal insufficiency developed polyuria. Diuresis intensification at the beginning of polyuria stage of acute renal insufficiency is caused by:

Answer options

1. Volume expansion of circulating blood
2. Renewal of filtration in nephrons
3. Reduction of vasopressin content in plasma
4. Growth of natriuretic factor
5. Reduction of aldosteron content in plasma