The most basic stimulus to begin the Release will be more accurately just renal Hypo perfusion we'll get there. As this pressure drops It stimulates a certain cell a very cuboidal looking cell, which is going to be called Sorry box head box head or cubed Okay. This is called a renin releasing granular cell or a juxicle marilla cell So this is part of the juxicles marilla apparatus. And as they split blood pressure drops because you're diverting blood into multitudes Or different areas and the pressure drops. By the time it's gotten to the kidneys via the renal artery Blood pressure will have dropped but if your heart is not pumping out a high pressure