change, alter, vary, modify mean to make or become different. change implies making either an essential difference often amounting to a loss of original identity or a substitution of one thing for another. changed the shirt for a larger size; alter implies a difference in some particular respect without suggesting loss of identity.
hydrophilic - having a strong affinity for water; tending to dissolve in, mix with, or be wetted by water. chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions.
The membrane consists of a double-layer (a phospholipid bilayer) of amphipathic lipids. The hydrophobic ends face each other on the inside, and the hydrophilic ends are on the outsides of the membrane. That way, the hydrophobic regions do not interact with water, and the hydrophilic regions do. Both parts of each phospholipid molecule are happy.. Other molecules are also found in the membrane.