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11 Cards in this Set
- Front
- Back
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Cell Surface Membrane
Structure and Fucntion |
- 'Triliminar' - 3 layers, a pale layer sandwiched between 2 dark layers
- A partially permeable barrier controlling the exchange between the cell and its environment - Act as receptors for hormones, nurotransmitters - Allow compartments to be formed inside the cell. |
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Nucleus
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- chromosomes contain DNA, the molecule of inheritence.DNA is organised into genes which control all the activities of the cell.
- nucleous - manufactures ribosomes - nuclear envelope - regulates the flow of substances in and out of the nucleus |
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Endoplamic reticulum (ER)
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- Rough ER - transports proteins made by the ribosomes through the cisternae
- Smooth ER - site of lipid and steroid synthesis |
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Golgi apparatus
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- Makes lysosomes
- Internal processing and transport system - Proteins from ER, golgi vesicles transport the material to other parts of the cell |
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Mitochondria
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- where aerobic respiration takes place.
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Ribosomes
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- Protein synthesis
- They are either bound to the ER or lie free in the cytoplasm |
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Centrioles and microvilli
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- produce spindle fibres during nuclear division
- organise microtubules - can be found in the cilia and the flagella - microvilli - brush border |
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Tissue
DEFINE |
A collection of similar cells specialised to perform one more particular functions
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Pro vs Eu
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Pro
-loop of DNA -no nuclar envelope - no histones - 70s ribosomes - no membrane bound organelle Eu - linear DNA - nuclear envelope - histones - 80s ribosomes |
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Resolution
DEFINE |
The ability to distinguish between two seperate objects
- EM has higher resolution because it has a shorter wavelength of 0.5 nm - LM is 200 nm |
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Magnification
DEFINE |
- Enlargement to reveal further detail
- How many times images are bigger than the real size |
