The question is what stimulates the release of our ADH of the vasopressin? So the vasopressin, our antidiaretic hormone, is basically stimulated by the following. When we basically have an increase in the osmolarity of our blood, meaning the blood volume decreases, the amount of fluid, the amount of water in the blood decreases at the same time the amount of solute increases. This is what stimulates the release of ADH from the post sphere pituitary gland. So basically, it is released into this network of vessels, blood vessels, and they basically leave and exit the vein. So these three endings are the hypothesical veins.