Function Keys are also heavily used in the BIOS interface. Generally during the power-on self-test, BIOS access can be gained by hitting either a function key or the delete key. In the BIOS keys can have different purposes depending on the BIOS.
Freebase(0.00 / 0 votes)Rate this definition: Surfactant. Surfactants are compounds that lower the surface tension of a liquid, the interfacial tension between two liquids, or that between a liquid and a solid. Surfactants may act as detergents, wetting agents, emulsifiers, foaming agents, and dispersants.
Surfactant reduces surface tension, so that the alveoli in the lungs are able to expand. It is essentially a biological detergent.Surfactant reduces surface tension. Without surfactant, the wet surfaces of the alveoli in your lungs would stick together and your lungs would not be able to expand-so, you would not be able to breath.The alveoli are the tiny sacs in your lungs where oxygen is captured from inhaled air and absorbed into your bloodstream.ithout surfactant, the wet surfaces of the alveoli in your lungs would stick together and your lungs would not be able to expand-so, you would not be able to breath. The alveoli are the tiny sacs in your lungs where oxygen is captured from inhaled air and absorbed into your bloodstream.