Renal artery stenosis is going to decrease blood flow to the kidney. JG cells sense the decrease in perfusion pressure and secrete renin.
Renin is produced by the JG cells, JG cells are in the cortex (they are modified smooth muscle of the afferent arteriole).
Question is asking what part of the kidney secreted renin.
order of thinking:
TLDR; if renin is secreted by JG cells and JG cells are in the glomeruli which is in the renal corpuscle which is in the renal cortex, then JG cells are in the renal cortex so RENIN WILL BE HIGHEST IN CORTEX
So I must have misunderstood - the arcuate arteries are in the cortex which is why I picked cortex - but we're saying the renin will always be highest in the cortex? - p. 564 FA
I think this one is literally just asking what part of the kidney will be the most poorly perfused. That part would have the most renin. Also, the medulla doesn’t have JG cells so I guess that’s another reason why it couldn’t have the most renin.