A circular movement of water, counter to a main current, causing<span> a small </span>whirlpool<span>. .</span>
Answer:
Renin is secreted from juxtaglomerular kidney cells, which sense changes in renal perfusion pressure, via stretch receptors in the vascular walls. The juxtaglomerular cells are also stimulated to release renin by signaling from the macula densa.
Explanation:
