Final answer:
Adipocytes, specifically white and brown, are cells that can swell and store energy in the form of lipid droplets. Plant cells can also store energy through water absorption and pressurization, while animal cells store carbohydrates as glycogen for energy supply.
Step-by-step explanation:
The type of cell that can swell up and store energy is known as an adipocyte. Adipocytes are specialized cells that store energy in the form of lipid droplets, which can fill most of the cytoplasm of the cell.
There are two types of adipocytes: white adipocytes, which store lipids as a single large drop and are less metabolically active; and brown adipocytes, which store lipids as many small droplets and have high metabolic activity.
In addition to adipocytes, plant cells can also swell due to water gain and store energy. This is seen in phenomena like 'Explosive' movements in seed dispersal, where a container such as a cell becomes pressurized, storing energy in its walls that can be used to cause movement when the wall breaks open.
Lastly, animal cells store carbohydrates in the form of glycogen. For example, in humans, glycogen is abundant in liver and muscle cells. When the body requires energy, these glycogen reserves are broken down into glucose to supply energy.