Term
| What does the mitochondiral membrane have a high ratio of in comparison to RBCs |
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Definition
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Term
| What are 7 membrane functions |
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Definition
1. compartmentalization
2. scaffold for biochemical activites
3. Providing A selectivily permeable barrier
4. transporting solutes
5. Responding to external solutes
6. Intercellular interacino
7. Energy transduction |
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Term
| What are the 3 types of membrane lipids |
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Definition
1. phosphoglycerides
2. Sphinolipids
3. cholesterol |
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Term
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Definition
| lipd with phosphate built on a glycerol backbone |
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Term
| ARe phosphoglycerides triglycerides or diglycerides? |
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Definition
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Term
| What are the hydroxul groups of a phosphglyceride esterfied to? |
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Definition
2 to fatty acids
1. to a hydrophilic phosphate group which is linked to an additional group(PC, PE, PS, PI) |
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Term
| what are the 4 main types of membrane phosphoglycerides? |
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Definition
1. phsophatidylcholine(PC)
2. phosphatidylehtanolamine(PE)
3. Phosphatidylserine(PS)
phosphatidyl inositol(PI) |
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Term
| What is the head group on a phosphyglyceride? |
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Definition
| the side groups(PE,PS,PI,PC) and the negativly charge phosphate its attached to= h20 soluble portion |
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Term
| What are the charges of the head groups at physiological pH? |
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Definition
PS/PI= neg.
PC/PE= neutral |
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Term
| What are teh characteristics of eh fatty acyl chains on the phosphoglycerides? |
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Definition
| hydrophobic and 16-22 Cin lnegth. usually in a phosphoglyceride one FA chain is unsaturated and one saturated |
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Term
| Whichi s more healthier? Saturated or unsaturated? where can it be found in our diet? |
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Definition
| 2 unstaurated FA are healier and in fish oil. Ex. EPA and DHA- incorporated into PE and PC(brain and retina)...also called omega3 fatty acids.....amphipathic character |
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Term
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Definition
| derivitives of sphingosine=2 long hydrophobic hydorcarbon chains...and a hydrophilic region on the other. Similar in strx to phosphoglycerides. |
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Term
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Definition
| type of shpingolipids in which a carbohydrate is the hydrophilic region...play crucial roles in cell fxn.(esp. nervous system). also a role in infectious disease |
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Term
| different types of glycolipids |
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Definition
| 1. cerebroside-simple sugar attached to ceramide (in particular galactose)...2. ganglioside=cluster of sugars attached |
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Term
| How do cerebroside and ganglioside impact if lacking? |
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Definition
cerebroside= tremors/eventual peralisis
ganglioside=sever seizures/blindness |
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Term
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Definition
| sterol= upt o50% of teh lipid mol in the plasma mem...absent from most plant and all bacterial cells...rings=flat/rigid=interfere with FA tail movements |
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Term
| How doe celular mem. differ in characteristics of lipid composition |
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Definition
| 1. types of lipids...2. nature of head groups...3. species of FA chains. |
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