The (1)_________ (LELC) is the basic unit of all living organisms. Each of this unit is structurally composed of a
(2)____________ (CLUESUN)which controls all the cell’s activities, a (3)_________________ (MSOTPASYCL)that contains
organelles, and a selective (4)____________________ (LELC EARENBMM)that regulates the flow of materials into and out
of the cell. Not all substances can pass through the membrane, this property of the plasma membrane is called
(5)___________________________ (TIVECELSE MEAPERBLITYI).
The cell membrane is also called the (6) ________(MASALP) membrane and is made of a bilayer of (7)_______________
(HIDPHPOLIOSPS). The membrane has a hydrophilic (8)____________ (DAEH) and two hydrophobic (9)
_________(SLTIA). The head of a phospholipid is made of an alcohol and a (10)______________ (ATPHPHOSE) group,
while the tails are chains of (11)____________________ (TTFAY CIADS). Embedded in the phospholipid bilayer are
(12)________________(IEGRNTAL) proteins, while (13)______________ (RIPERAPHEL) proteins are only in one side.
Some of the
membrane proteins have (14)______________________ (COHADRATRBYE) receptors to help cells in recognizing each
other and certain molecules. (15)___________________ (CESTEHOLROL) molecules are often found stuck between
phospholipid molecules in the plasma membrane. They have a role in maintaining the fluidity of the membrane​