Term
| what is the function of the cell membrane? |
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Definition
1. to maintain homeostasis
2. to provide a boundary (prevents things from entering that cell doesn't want)
3. organizes and localizes function
4. important for controlling transport in and out of cell
5. structures on the membrane are involved in communication and detecting signals |
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Term
| what is the structure of the cell membrane? |
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Definition
| the cell membrane is a made up a lipid bilayer made up mostly of PS (phospholipid and serine) PC ("" choline) and PE (ethanolamine) |
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Term
| what is so special about cholesterol? |
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Definition
| it has a polar OH group which means the tail is stuck in the membrane but the OH off of the head causes the head to stick out. Present in all membranes |
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Term
| what is an example of a disease caused by lipids? |
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Definition
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Term
| Are membrane lipids distributed symetricall about the membrane? |
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Definition
NO,
PC are usually OUT and PE are in
once the membrane is assembled it does not flip. |
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