While holding your hand on your ribs, take a deep breath and observe how much your chest expands. How you would have to breathe at higher altitudes to achieve the same effect? A You would have to take slow, shorter breaths to take in the same number of air mo- lecules to achieve the same expansion. You would have to breathe exactly the same to take in the same number of air molecules to achieve the same expansion. You would have to breathe deeper to take in the same number of air molecules to achieve the same expansion. D You would have to take fast, shallow breaths to take in enough air molecules to get the same expansion.

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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.