Separating cell contents from the outside environment,separating cell components from cytoplasm, cell recognition and signalling,holding the components of some metabolic pathways in place, regulating the transport of materials into and out of cells.
Are all roles of membranes
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The phosphate 'head' is...?
Hydrophilic
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The two fatty acid 'tails' are...
Hydrophobic
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If phospholipid molecules are completely surrounded by water, a _______ can form.
Bilayer
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The ___________ group cannot easily pass through the ____________ region in the middle of the bilayer - This gives the bilayer some stability.
Hydrophilic head, hydrophobic
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A membrane is visible through a ....?
Electron Microscope
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What is differentiation?
The development and changes seen in cells as they mature to form specialised cells.
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All membranes are PERMEABLE to __________molecules because they can _______through the lipid bilayer
Water, diffuse
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Cell membranes are described as ...?
Partially-permeable membranes
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The main features of the model are..?
A bilayer of phospholipid molecules and various protein molecules floating in the phospholipid bilayer and some extrinsic and intrinsic proteins.
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Where phospholipid molecules have a carbohydrate part attached they are called ..?
Glycolipids
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Where protein molecules have a carbohydrate part attached to them they are called ..?
Glycoproteins
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Glycoproteins and Glycolipids may be involved in ...?
Cell Signalling and recognition
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What do Channel Proteins do?
Channel proteins allow the movement of some substances across the membrane such as glucose.
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What do Carrier Proteins do?
Carrier proteins actively move substances across the membrane. They carry a specific molecule or ion through the membrane by active transport.
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An example of this is...?
Beetroot
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Other cards in this set
Card 2
Front
The phosphate 'head' is...?
Back
Hydrophilic
Card 3
Front
The two fatty acid 'tails' are...
Back
Card 4
Front
If phospholipid molecules are completely surrounded by water, a _______ can form.
Back
Card 5
Front
The ___________ group cannot easily pass through the ____________ region in the middle of the bilayer - This gives the bilayer some stability.
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