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Additional
biological membrane
English Wikipedia - The Free Encyclopedia
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Biological membrane
A
biological membrane
or
biomembrane
is an enclosing or separating
membrane
that acts as a
selectively permeable
barrier within living things. Biological membranes, in the form of
cell membranes
, often consist of a
phospholipid bilayer
with embedded,
integral
and
peripheral proteins
used in communication and transportation of chemicals and
ions
. Bulk
lipid
in membrane provides a fluid matrix for proteins to rotate and laterally diffuse for physiological functioning. Proteins are adapted to high
membrane fluidity
environment of
lipid bilayer
with the presence of an
annular lipid shell
, consisting of lipid molecules bound tightly to surface of
integral membrane proteins
. The cellular membranes should not be confused with isolating tissues formed by layers of cells, such as
mucous membranes
and
basement membranes
.
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