Killer whales are marine mammals belonging to the family Delphinidae, formed by several species of dolphins, false killer whales and pilot whales.
Active transport is the key to the reabsorptive processes in the proximal tubule. Glucose and amino acids are reabsorbed across the apical membrane of the proximal tubule by sodium-coupled secondary active transport. Na + glucose transport is mediated by the low affinity, high capacity SGLUT2 transport protein.
What solutes are secreted and reabsorbed by the renal tubule? K+, NH3, H+, HCO3 (homeostasis), urea (absorption not regulated). î î î. 65% of Na, water, Cl, all of filtered glucose, almost all aa, most of K (90%), PO4, Ca, 1/2 urea.