Question 59 Which of the following statements explain why unsaturated fatty acids help keep any membrane more fluid at lower temperatures? O It allows the animal to add hydrogen atoms to unsaturated phospholipids. O It enables the membrane to stay fluid more easily when cell temperature drops. O It allows the animal to remove hydrogen atoms from saturated phospholipids. O It makes the membrane less flexible, allowing it to sustain greater pressure from within the cell. Question 60

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Q: positive feedback

A: B: positive feedback

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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.