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19 Cards in this Set
- Front
- Back
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how do cells communicate with one another? |
cell signalling |
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what happens to the cell membrane below 0c |
phospholipids dont move much so are rigid proteins denature increasing permability ice crystals pierce the membrane |
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what happens to the membrane between 0c and 45c? |
the membrane moves around making it partially permiable the higher the temp, the more it moves, the more permiable it is |
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what happens to the cell membrance above 45c? |
the phospholipids begin to melt making the cell more permiable water in the cell expands putting pressure on the membrane proteins denature |
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how do messenger molecules work? |
one cell releases a messenger molecule the molecule travels to another cell the molecule is detected by the cell as it binds to the receptor |
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what act as receptors for messenger molecules? |
membrane bound proteins |
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what does glucagon do? |
binds to receptors on the liver cells causing the cells to break down glycagon into glucose |
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give an example of a drug that affects cell receptors |
antihistimines |
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what does histimine do? |
binds to receptors and causes inflammation of the cell |
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do all cells have the same receptors? |
no! different cells have different receptors for different messenger molecules |
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what is a target cell? |
a cell that responds to a particular messenger molecule |
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give an example of a messenger molecule? |
glucagon |
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what is glucagon? |
a hormone |
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when is glucagon released? |
when their is not enough glucose in the blood |
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how do drugs effect cells? |
they trigger a responce in the cell inhibit a receptor |
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why do cells need to communicate with one another? |
to control the processes in the body to respond to changes in the environment |
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what do antihistomines do? |
they block the histomine receptors stopping inflamation of the cell |
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how do cells communicate with one another? |
they use messenger molecules |
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which protein do molecules bind to? |
ones with a complementory shape to the receptor |
