Renin is a protease which means it chops up proteins. It's stored in granules and then inside of these cells inside these cells will release it when there is a certain Stimulus they will release it. So one of these stimuli could be the drop in blood pressure in the afron arterial Yep, stimulating the baroreceptors stimulating these now do you want to move forward and call them juxicle marilla cells? Yeah, we call them granular cells. That's right.