Topic: Regulation of kidney function, disorders, dialysis· Human Physiology
Which of the following factors is responsible for the formation of concentrated urine ?
1. Low levels of antidiuretic hormone.
2. Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys.
3. Secretion of erythropoietin by Juxtaglomerular complex.
4. Hydrostatic pressure during glomerular filtration.