Question:The phospholipid composition of cell membranes causes the membranes to be impermeable to water molecules. However, Ca2+ and Mg+ and Cl- ions diffuse in and out of the cell because: a) Water is soluble in fatty acids found in phospholipids b) the Fatty Acid portion of the phospholipid component interacts with water c) the fatty acids are hydrophilic d) protein molecules embedded in the membrane function as H20 channels through the membrane, e) water is nonpolar.

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A:

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A:

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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.