CELL MEMBRANE Flashcards
Regulate the passage of molecules into
and out of cells and organelles
CELL MEMBRANE
Divide the cell into numerous
compartments, each with its own
specialized metabolism,
CELL MEMBRANE
Act as surfaces that hold enzymes.
CELL MEMBRANE
refers to something that
contains many different parts.
Mosaic
The plasma membrane is a
mosaic of
phospholipids,
cholesterol molecules, proteins
and carbohydrates.
The plasma membrane is a
mosaic of phospholipids,
cholesterol molecules, proteins
and carbohydrates.
THE FLUID MOSAIC MODEL
COMPONENTS OF
MEMBRANE
- Phospholipids
- Cholesterol
- Proteins
- Carbohydrates
Make up the basic structure of a cell membrane.
Phospholipids
Head end
contains a phosphate group and is hydrophilic.
Tail end
made up of two strings of
hydrogen and carbon atoms
made up of two strings of
hydrogen and carbon atoms
fatty acid chains.
These chains are hydrophobic
fatty acid chains.
heads are always
arranged so that they are near water.
hydrophilic phosphate
are organized in a
manner that keeps them away from water.
hydrophobic tails
Cholesterol
* Made up of
four rings of hydrogen and carbon Atoms.
Are hydrophobic and are found among the
hydrophobic tails in the lipid bilayer.
Cholesterol
Important for maintaining the consistency of the
cell membrane.
Cholesterol
Strengthen the membrane by preventing some
small molecules from crossing it.
Cholesterol
Ensures that the cell membrane stays fluid and
flexible.
Cholesterol
Are located in the lipid bilayer and are called
integral proteins.
PROTEIN can be found on
either side of the lipid bilayer: inside the cell or outside the cell.
peripheral
proteins,
proteins Function as
enzymes to speed up
chemical reactions, act as receptors
for specific molecules, or transport
materials across the cell membrane.
They are only found on the extracellular side of a
cell membrane.
Carbohydrates
Form the glycocalyx
Carbohydrates
