Cell Membranes - Parts and Roles
- Created by: Vikki4
- Created on: 04-03-15 19:55
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- Cell Membranes
- Glycolipids and Glycoproteins
- Proteins
- Cell Membranes
- Glycolipids and Glycoproteins
- Proteins
- Channel
- Movement of specific substances
- Large and polar molecules
- Carrier
- Actively move some things against concentration gradient
- Mg+ ions for making chlorophyll, also encourages osmosis
- Nitrate ions into xylem vessels encourages osmosis
- Oscillate naturally for others down the concentration gradient
- Actively move some things against concentration gradient
- Channel
- Cell recognition and cell signalling
- Lipid with carbohydrate
- Protein with carbohydrate
- Receptor sites
- Hormones bind with these on cell to trigger a response
- Drugs bind to these to affect cell metabolism
- Something can only bind if the cell membrane has that specific receptor site
- Proteins
- Roles
- Compartmentalisation
- Selectively allowing materials in and out of the cell
- Holding metabolic pathways in place
- Enzymes
- Proteins
- Reactions in photosynthesis take place in membranes in the chloroplasts
- Stacked in thylakoids
- Hold more enzymes and coenzymes for more reactions
- Coenzymes
- Stages of respiration take place in membranes in mitochondria
- Folded
- Can hold more enzymes and coenzymes for more reactions
- Cell recognition and cell signalling
- Separating the contents of the cell from the outside
- Different types of membranes
- Tonoplast membrane
- Surrounds vacuole
- keeps contents of vacuole in position
- Plasma membrane
- Separates insides of cell from environment
- Holds the cytoskeleton in place
- Tonoplast membrane
- Examples of specialisation
- Muscle cells
- Lots of carrier proteins
- Glucose uptake
- Down the concentration gradient
- Does not require ATP
- Plasma membranes have cell receptors that regulate growth
- WBC Plasma Membranes
- Protein receptors
- Recognice foreign cells and particles
- Internal membranes of chloroplasts
- Chlorophyll
- Other molecules for photosynthesis
- Muscle cells
- Fluid Mosaic Model
- 1972 - Singer and Nicholson
- Phospholipid bilayer forms basic structure
- Cholesterol to stabilise
- Steroid molecule
- Makes fatty acid barrier more complete
- Materials can't pass through as easily
- Cholesterol to stabilise
- Protein molecules float in phospholipid bilayer
- Some free
- Some bound to other membrane components
- Intrinsic and extrinsic
- Channel and carrier
- Some attached to the cytoskeleton and so cannot move
- Glycolipids and Glycoproteins
- Channel
- Movement of specific substances
- Large and polar molecules
- Carrier
- Actively move some things against concentration gradient
- Mg+ ions for making chlorophyll, also encourages osmosis
- Nitrate ions into xylem vessels encourages osmosis
- Oscillate naturally for others down the concentration gradient
- Actively move some things against concentration gradient
- Cell Membranes
- Cell recognition and cell signalling
- Lipid with carbohydrate
- Protein with carbohydrate
- Receptor sites
- Hormones bind with these on cell to trigger a response
- Drugs bind to these to affect cell metabolism
- Something can only bind if the cell membrane has that specific receptor site
- Proteins
- Roles
- Compartmentalisation
- Selectively allowing materials in and out of the cell
- Holding metabolic pathways in place
- Enzymes
- Proteins
- Reactions in photosynthesis take place in membranes in the chloroplasts
- Stacked in thylakoids
- Hold more enzymes and coenzymes for more reactions
- Coenzymes
- Stages of respiration take place in membranes in mitochondria
- Folded
- Can hold more enzymes and coenzymes for more reactions
- Cell recognition and cell signalling
- Separating the contents of the cell from the outside
- Different types of membranes
- Tonoplast membrane
- Surrounds vacuole
- keeps contents of vacuole in position
- Plasma membrane
- Separates insides of cell from environment
- Holds the cytoskeleton in place
- Tonoplast membrane
- Examples of specialisation
- Muscle cells
- Lots of carrier proteins
- Glucose uptake
- Down the concentration gradient
- Does not require ATP
- Plasma membranes have cell receptors that regulate growth
- WBC Plasma Membranes
- Protein receptors
- Recognice foreign cells and particles
- Internal membranes of chloroplasts
- Chlorophyll
- Other molecules for photosynthesis
- Muscle cells
- Fluid Mosaic Model
- 1972 - Singer and Nicholson
- Phospholipid bilayer forms basic structure
- Cholesterol to stabilise
- Steroid molecule
- Makes fatty acid barrier more complete
- Materials can't pass through as easily
- Cholesterol to stabilise
- Protein molecules float in phospholipid bilayer
- Some free
- Some bound to other membrane components
- Intrinsic and extrinsic
- Channel and carrier
- Some attached to the cytoskeleton and so cannot move
- Glycolipids and Glycoproteins
- Partially permeable membranes
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