Lipids are carbon-containing compounds that are found in organisms and are largely nonpolar and hydrophobic; they do not readily dissolve in water

Saturated lipids are solid at room temperature because they have no double bonds, unsaturated lipids are liquid at room temperature because they have double bonds and the lack of hydrogen reduces opportunities for attraction between molecules and the melting point falls

All fats are considered to be lipids, but not all lipids are considered fats. Fats are nonpolar molecules composed of three fatty acids that are linked to a three carbon molecule called a glycerol

Lipid groups: fats, steroids (including cholesterol), and phospholipids

Lipids are different from phospholipids because phospholipids are amphipathic, containing a polar head and a nonpolar tail region; however, lipids are entirely nonpolar, containing a 3 Carbon glycerol at the head instead of a polar head.

Hydrophilic: (“water loving”) having a tendency to mix with, dissolve in, or be wetted by water.

Hydrophobic: (“water fearing”)the physical property of a molecule that is seemingly repelled from a mass of water

Amphipathic: compounds that contain both hydrophilic and hydrophobic elements (ex: phospholipids and cholesterols)

Amphipathic lipids play a central role in biology because they can form phospholipid bilayers, which are related to the selective passage of nutrients and materials into cells and waste out of cells, which allows cells and organisms to survive.

Water, gases, and fatty acids???