Which of the following is an example of secondary active transport using an antiporter?A: A transporter that allows mammalian cells to move biotin into the cell against its concentration gradient using the Na gradient.B: A transporter that moves HCO3- out of erythrocytes and Cl- into erythrocytes in actively respiring tissues but reverses the direction of solute movement in lungs.C: A transporter in the plasma membrane of mammalian cells that uses ATP hydrolysis to move Na and K against their concentration gradients.D: A transporter that allows mammalian cells to keep the cytosolic Ca2 concentration low compared to the extracellular Ca2 using energy from the Na gradient.
