Amphiphilic
Definition
Amphiphilic molecules have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts. These dual characteristics allow them to interact with both aqueous and non-aqueous environments.
5 Must Know Facts For Your Next Test
- Amphiphilic molecules can form micelles in water, with the hydrophobic tails inward and hydrophilic heads outward.
- Soaps and detergents are common examples of amphiphilic substances used in everyday life.
- These molecules play a significant role in the formation of cellular membranes by creating lipid bilayers.
- Amphiphiles can act as emulsifiers, stabilizing mixtures of oil and water.
- They are critical in various biochemical processes, including drug delivery systems.
Review Questions
- What is the structural characteristic that defines an amphiphilic molecule?
- How do amphiphilic molecules behave when placed in water, and what structure do they form?
- What practical applications utilize amphiphilic substances?
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Related terms
Micelle: A spherical structure formed by amphiphilic molecules in aqueous solutions where hydrophobic tails are sequestered inside and hydrophilic heads face outward.
Lipid Bilayer: A double-layered arrangement of amphiphilic lipid molecules that forms the basic structure of cell membranes.
Emulsifier: A substance that stabilizes an emulsion by reducing the surface tension between two immiscible liquids, often containing amphiphilic molecules.
