Transport Mechanism Flashcards
Cell membrane described as
Fluid Mosaic Model
Where does transport mechanism happens
Plasma membrane/ Cell membrane/Plasmalemma
Fluid in Fluid Mosaic Model
Not solid, Flexible, same consistency of vegetable oil
Mosaic in Fluid Mosaic Model
Many parts, the 4 molecules
4 molecules of Cell membrane
Phospholipids, Cholesterol, Proteins, Carbohydrates
Two ends of phospholipid
Head end, Tail end
Composed of phosphate group
Hydrophilic (water liking)
Head end
Fatty acid chains
Hydrophobic (water fearing)
Tail end
Two strings of hydrogen and carbon atoms
Fatty acid chains
make up the basic structure of a cell
membrane
Phospholipids
The phospholipids of a cell
membrane are arranged in a
double layer called the
Lipid bilayer
Watery fluids inside the cell
Intracellular fluids
Watery fluids outside the cell
Extracellular Fluids
- Maintains the consistency of the cell membrane
- Prevents small molecules from entering
- found in HYDROPHOBIC TAILS
Cholesterol
Cholesterol molecules made up of
Fours stings of hydrogen and carbon atoms
2 types of plasma membrane proteins locations
Integral and Peripheral
Plasma membrane proteins are located in the lipid bilayer
Integral proteins
Other proteins outside the lipid bilayer, either inside the cell or outside the cell
Peripheral proteins
Funtions of proteins
- Enzyme (speeds up chemical reaction)
- Receptor (recieves specific molecules)
- Transportation (transports materials across the cell membrane)
Building block of carbohydrates
Monosaccharide
- Sugar
- sometimes attached to proteins of lipids
- found in EXTRACELLULAR side of the cell membrane
Carbohydrates
Carbohydrates attached to lipids
Glycolipids
Glyco means
Sugar
Carbohydrates attached to proteins
Glycoproteins
