So I have a few questions about it: What is AP humanities? (The teacher has a bunch of art around his room so I'm assuming it has to do with art) What do you do in AP humanities? Is... show more We just got our class choices for next year and as I was looking over the AP choices, I noticed that AP humanities was on it.
Angiotensin-converting enzyme. Angiotensin-converting enzyme (EC 3.4.15.1), or ACE, is a central component of the renin-angiotensin system (RAS), which controls blood pressure by regulating the volume of fluids in the body. It converts the hormone angiotensin I to the active vasoconstrictor angiotensin II.
Secretion is an active process. In the kidney tubules, somethings, like K+ is secreted from the peritubular capillaries, into tubular cells, and then out into the lumen to mix with the fluid. Excretion is passive. What is excreted by the kidneys is everything that is not reabsorbed and what is secreted.