Bowman's capsule in these structures surrounds the glomerulus, and they have a countercurrent exchange mechanism to osmoregulate through the Loop of Henle.
The macula densa, composed mostly of these structures, controls the GFR. These structures, which come in juxtamedullary and cortical forms, contain a long narrow region which is permeable to sodium ions but not water, called the ascending limb. The renin-angiotensin system is regulated by these structures, which are affected by antidiuretic hormone. Bowman's capsule in these structures surrounds the glomerulus, and they have a countercurrent exchange mechanism to osmoregulate through the Loop of Henle. They are vital for blood filtration. For 10 points, name these functional units of the human kidney.
The macula densa, composed mostly of these structures, controls the GFR.
nephrons [prompt on "kidneys"]