You're studying secretion of antibodies by B-cells. B-cells are immune cells that make antibodies (antibodies are proteins) and secrete them outside of the cell (in other words, the protein is made in the cell, and is 'spit' out). Given the B-cell's role as antibody secreter what organelles do you expect to see in large amounts/volume within the cell? What type of transport is antibody secretion? Does the secretion of antibody require energy (ie., is this type of transport "active")?

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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.