The sodium Na+/Glucose symport moves sodium and glucose across the plasma membrane. A) Describe was is meant by a symport. Include in your answer whether a symport is an example of a channel protein or a carrier protein. B) Why does the Na+/Glucose transporter work in only one direction? C) Describe how glucose can be both actively and passively transported into an out of the same cell. Include in your description how localization of transport proteins allows for these two different types of transport to occur in the same cell.

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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.