Asked in Artists and PaintersJohn F. KennedyElla Fitzgerald
Artists and Painters
John F. Kennedy
Ella Fitzgerald
Who are L.L. Fitzgerald's parents?
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Related Questions
Asked in Microbiology, Cell Biology (cytology)
Cell membrane a layer of fats?

The cell membrane consists of two molecular structures: Proteins
and Phospholipids. The proteins are used for cell recognition,
communication, and for moving substances in and out of the cell.
The vast majority of the cell membrane is made of phospholipids. A
phospholipid consists of a phosphate "head" with two long "tails"
of lipids. The phosphate head is "hydrophilic" meaning it is
attracted to liquid environments. The lipid tails are "hydrophilic"
meaning they move away from liquid environments. The cell membrane
is two layers of these phospholipids. The outer layer has the heads
pointing towards the liquid environment outside the cell. The inner
layer has the heads pointed inwards towards the liquid interior of
the cell. The tails are on the inside of this layer, in a dry
environment.
Outside environment
OOOOOOOOOOOOOO <- Phosphate heads (Hydrophilic)
l ll ll ll ll ll ll ll ll ll ll ll ll ll l
Inside the bilayer
l ll ll ll ll ll ll ll ll ll ll ll ll ll l <- Lipid tails
(Hydrophobic)
OOOOOOOOOOOOOO
Cell interior
Asked in Mark Twain
Who is Fitzgeralds poet?
Asked in Cell Biology (cytology)
What is the arrangement of the molecules in the cell membrane?

They call the membrane the phospholipid bilayer because it is
composed of two layers of phospholipids. A phospholipid is made up
of a phosphate head (o) with two hydrocarbon tails (ll). so it
looks something like this:
o
ll
The head is hydrophilic, meaning it likes water. The tails are
hydrophobic, meaning they don't like water. The phospholipids
arrange themselves in a way so that the tails don't touch
water:
outside of cell
o o o o o o o o o
ll ll ll ll ll ll ll ll ll
ll ll ll ll ll ll ll ll ll
o o o o o o o o o
inside of cell
There are other molecules and proteins incorporated in the cell
membrane to help with cell-cell communication, transporting things
into and out of the cell, and helping to keep the cell membrane
fluid (cholesterol).