Which of the following statements about secretion is true? O All secretory vesicles bud off the trans Golgi network and fuse with the plasma membrane continuously without any regulation. O In regulated secretion, the secretory vesicles containing secreted materials are preformed and positioned close to the plasma membrane. This allows the rapid release of a large amount of cargo in a very short period when the cell receives the right signal. O The release of insulin is a form of constitutive secretion. None of the above

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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.