Diffusion, Osmosis, Active Transport
Lipids and Phospholipids
The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate, a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy.
The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate, a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy.
Fatty acids
Fatty acids
Glycerol
Glycerol
Phosphate
Phosphate
Choline
Choline
Cholesterol
Cholesterol
Hydroxyl head – is hydrophilic and therefor orients itself with the polar heads of the phospholipids.
Hydroxyl head – is hydrophilic and therefor orients itself with the polar heads of the phospholipids.
Steroid Rings – Consists of four hydrogen rings which attract the tail of the phospholipid to make the cell membrane less soluble
Steroid Rings – Consists of four hydrogen rings which attract the tail of the phospholipid to make the cell membrane less soluble
Cholesterol can approximately make up 50% of the plasma membrane. It Reduces membrane fluidity by reducing phospholipid movement therefor giving the membrane the shape it needs instead of it looking like a deflated balloon. It also maintains its flexibility over a range of temperatures for example it prevents solidification at low temperatures.
Cholesterol can approximately make up 50% of the plasma membrane. It Reduces membrane fluidity by reducing phospholipid movement therefor giving the membrane the shape it needs instead of it looking like a deflated balloon. It also maintains its flexibility over a range of temperatures for
The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate, a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy.
The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate, a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy.
Fatty acids
Fatty acids
Glycerol
Glycerol
Phosphate
Phosphate
Choline
Choline
Cholesterol
Cholesterol
Hydroxyl head – is hydrophilic and therefor orients itself with the polar heads of the phospholipids.
Hydroxyl head – is hydrophilic and therefor orients itself with the polar heads of the phospholipids.
Steroid Rings – Consists of four hydrogen rings which attract the tail of the phospholipid to make the cell membrane less soluble
Steroid Rings – Consists of four hydrogen rings which attract the tail of the phospholipid to make the cell membrane less soluble
Cholesterol can approximately make up 50% of the plasma membrane. It Reduces membrane fluidity by reducing phospholipid movement therefor giving the membrane the shape it needs instead of it looking like a deflated balloon. It also maintains its flexibility over a range of temperatures for example it prevents solidification at low temperatures.
Cholesterol can approximately make up 50% of the plasma membrane. It Reduces membrane fluidity by reducing phospholipid movement therefor giving the membrane the shape it needs instead of it looking like a deflated balloon. It also maintains its flexibility over a range of temperatures for