suppose the cytosolic pH of Plasmodium is 7.1. Suppose PfCRT is a secondary active symporter using protons to drive VF-6-2 efflux from the digestive vacuole, DV. Suppose the membrane potential across the DV membrane is 50mV, inside positive. VF-6-2 has a 3nM concentration inside the DV and a 56nM concentration in the cytosol. What pH must the P-type ATPase establish inside of a digestive vacuole in order to allow PfCRT to spontaneously transport 1 VF-6-2 out of the DV with 1 H+ at 37°C??

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.