There an enzyme called angiotensin converting enzyme or ace, basically transforms angiotensin one into angiotensin two. Now, angiotensin two is basically one of the final products of this pathway because it itself can actually stimulate our blood vessels to constrict, and it also stimulates the increase in our blood volume and blood pressure inside our blood vessels. Now, the question is, how exactly does it achieve this? Well, once angiotensin two is produced and released into our bloodstream, what happens is it basically goes on to special cells inside our adrenal cortex known as the zona glomer lucia. And this zone, this region that contains these special types of cells, basically releases our hormone known as aldosterone. And aldosterone, as we know from our discussion on the adrenal cortex, basically causes our kidneys to become more permeable to certain ions.