You did a great job on reaching at this far end of this module! Let's wrap up this brilliant learning experience with another exciting activity. As you have gone through the lesson, most cells exist in an aqueous environment. Their cell membranes selectively obtain certain materials from this liquid environment for them to remain alive and prevent some harmful materials from entering. Also, their cell membranes expel out harmful substances, like the waste products of cellular activities, and prevent essential substances from leaving. But what do you think would happen to a cell if its cell membrane lost its selectivity? Make an illustration (with a title) that shows your response to this question.

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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.