Habibullah Al Galib presents information on the fluid mosaic model of cell membranes. The fluid mosaic model proposes that cell membranes are composed of phospholipid molecules embedded with proteins that allow for fluidity and mosaic-like structure. Specifically, the model states that 40% of the membrane is lipid, 55% is protein, and 5% is carbohydrate. Lipid molecules are amphipathic with a hydrophilic head and hydrophobic tails. There are two types of membrane proteins - integral proteins embedded in the membrane and peripheral proteins on the surface. In addition, cholesterol is an essential lipid component that modulates membrane fluidity. The cell membrane functions to protect the cell, facilitate selective transport, and allow for cell adhesion through membrane

1. Name : Habibullah Al Galib
Department : B. SC in medical laboratory technology
Student id : 2111225001081
FLUID MOSAIC MODEL

2. • THE CELL MEMBRANE
• The cell membrane also called the plasma membrane.
A thing membrane that surround every living cell.
Electron microscope has show that cell membrane
has a clear structure having total thickness of 10 to 7
nm , and is Know as unite membrane. Biologically the
cell membrane is composed of complex mixture of
lipid 40% protein 55% and carbohydrate 5%.

3. • THE FLUID MOSAIC MODEL OF MEMBERS
STRUCTURE
• In 1972 singer and Nicolson put forward the
fluid mosaic model of membrane structure
which is presently most accepted
• STRUCTURE :
• FLUID : the molecules can move within the
membrane
• MOSAIC : Others molecules eg proteins are
embedded within the possibility by layer .

5. • COMPOSITION
1.Phospholipid
2.Cholesterol
3.Protein
4.Carbohydrate

6. 1. PHOSPHOLIPID MOLECULES
• A phospholipid is a lipid made of glycerol, 2 fatty
acid layers and a phosphate linked head group.
• phospholipid molecules is omphiphatic molecule
• Polar head- hydrophilic ( water living )
• No polar tales – hydrophobic (water hating )
• Amphipathic = 50% hydrophilic and 50%
hydrophobic.

7. 2. PROTEIN
• There are two types of protein found
in cell membrane.
• Integral protein buried in cell (70% of
total protein)
• Peripheral protein - present on of
surface of cell membrane (30% total
protein)

8. 3. CARBOHYDRATE
• Carbohydrate are the third
Major of cell membrane.
• Cell protection and / or
insolution.
• Receptor sites for binding of
other molecules.
• Attachment of cell to one others

9. 4. CHOLESTEROL
• Cholesterol in essential lipid
constituents of cell membrane.
• Cholesterol precursor steroid
hormone of bill acid.
• High plasma cholesterol promotes
atherosclerosis.
• Precursor for vitamin D.

10. • FUNCTION
• Protective: from outer most boundary of cell.
• Digestive: takes in food and excretes wasted products.
• Selective permeability: Helps in transport across the cell
membrane.
• Cell adhesion molecule : present on the plasma membrane of
certain cell plays on important role in the inflammation .
• Junction: Helps information of various type of junction along
with the help of cytoskeleton elements.

11. THANK YOU
Presentation by Habibullah Al Galib