We've talked a bit about how things get out of the cell: they are transported to the membrane and released, but I didn't have time to cover how things get into the cell. For this week's discussion, find something that gets into or is taken up by the cell and describe how it happens. It could be a virus, a bacteria, a protein that people have eaten, a toxic chemical, a selective DNA stain, anything that gets taken up by the cell. How does the cell recognize it? Why is it taken up? What happens after it is?