The human body uses lipids for a variety of applications, including as a fuel source, to construct membranes and to protect and insulate the body. While ingesting too many lipids can cause health problems, the ingestion of some is necessary. Lipids occur naturally as oils, fats and waxes.
Lipids that are solid at room temperature are called fats. The human body uses fats primarily as an emergency food source. This is because fats are more calorically dense than any other type of macromolecule, making them the most efficient substance for storing energy. When an animal eats more food than it needs, it stores the excess energy in the chemical bonds of lipids. Later, when the animal needs to access these reserves, it breaks the chemical bonds, releasing energy.
Additionally, the human body relies on fat to help insulate the body from cold temperatures. Other animals use fats in the same way, such as seals, polar bears and other creatures living in cold climates. Lipids repel water, which makes them very useful molecules for a body that is 60 percent water. By using lipids to form membranes, the body can channel and contain water where it needs. Lipids also work to protect some delicate structures of the body. For example, the fat found around a human’s internal organs helps to protect these important structures from damage.Learn More
Lipids are a wide category of compounds that are known as biomolecules. Lipids include neutral fats, steroids, oils and waxes. They are created by the body naturally to be used in a variety of biological membranes and reactions.Full Answer >
Lipids, or fats, are used in living things in a wide variety of different ways, including energy storage and insulation. There are other beneficial properties that lipids can be used for, however, such as digestion and helping provide structure for certain parts of the structure of an organism's cells. In some living things, lipids are even part of the process by which hormones are formed in the body.Full Answer >
Steroids are considered lipids because they exhibit the primary defining characteristic of lipids, which is insolubility in water. Steroids look much different than most lipids, consisting of four carbon-based rings (three six-carbon rings and one five-carbon ring), instead of long chains.Full Answer >
LNG vehicles use liquefied natural gas as a fuel source. Natural gas is compressed to minus 260 degrees Fahrenheit and stored in insulated tanks until it is used by a vehicle's engine. Liquefied natural gas reduces its volume by 600 times from its gaseous state.Full Answer >