There are three main types of cell transport: passive transport, active transport, and bulk transport. Passive transport includes diffusion, osmosis, and facilitated diffusion, which do not require energy expenditure by the cell. Active transport involves the cell using energy, usually in the form of ATP, to move molecules against their concentration gradient. Bulk transport includes endocytosis, where the cell engulfs extracellular material, and exocytosis, where the cell expels material out of the cell. These different types of cell transport play crucial roles in maintaining homeostasis and allowing cells to function properly.
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