The concentration of potassium ions in plasma

The concentration of potassium ions in plasma (K, in mM) is regulated by the concentration of the hormone aldosterone (A, in ng/100 ml). As aldosterone increases, the kidney excretes more potassium in the urine and the plasma concentration of potassium ions decreases K.174 When the extracellular potassium ion concentration rises, the adrenal gland produces more aldosterone 16K 200 a) Draw a block diagram of the feedback loop, including accurate plots of the two relationships. b) Calculate the operating point and the open loop gain. (Note: you may have to find these numerically or graphically.) 20 c) Suppose the behavior of the kidney changed so KDetermine the new value of K if the regulation of aldosterone is not functioning (A is equal to that found in part b), and then determine the new value of K taking regulation of aldosterone into account.