Thursday, October 28, 2004
C8H10N4O2
Adenosine binds to adenosine receptors in the brain and this binding of adenosine causes drowsiness by slowing down nerve cell activity. In the brain, adenosine binding also causes blood vessels to dilate (presumably to let more oxygen in during sleep).
To a nerve cell, caffeine looks like adenosine. Caffeine, therefore, binds to the adenosine receptors. However, it doesn't slow down the cell's activity as adenosine would. The cells cannot sense adenosine anymore because caffeine is taking up all the receptors adenosine binds to. So instead of slowing down because of the adenosine level, the cells speed up. You can see that caffeine also causes the brain's blood vessels to constrict, because it blocks adenosine's ability to open them up. This effect is why some headache medicines, like Anacin, contain caffeine - if you have a vascular headache, the caffeine will close down the blood vessels and relieve it.
Hmmm....feeling really really sleepy today. In fact coffee doesn't even help me anymore. Caffeine....BAH! Still need to keep awake to finish animating these bloody scene fixes. Ok so coffee doesn't work anymore. Red Bull next. Red bull, red bull, red bull, ed bull, bull, bull, bull, bull......
To a nerve cell, caffeine looks like adenosine. Caffeine, therefore, binds to the adenosine receptors. However, it doesn't slow down the cell's activity as adenosine would. The cells cannot sense adenosine anymore because caffeine is taking up all the receptors adenosine binds to. So instead of slowing down because of the adenosine level, the cells speed up. You can see that caffeine also causes the brain's blood vessels to constrict, because it blocks adenosine's ability to open them up. This effect is why some headache medicines, like Anacin, contain caffeine - if you have a vascular headache, the caffeine will close down the blood vessels and relieve it.
Hmmm....feeling really really sleepy today. In fact coffee doesn't even help me anymore. Caffeine....BAH! Still need to keep awake to finish animating these bloody scene fixes. Ok so coffee doesn't work anymore. Red Bull next. Red bull, red bull, red bull, ed bull, bull, bull, bull, bull......
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too much caffeine and red bull's not good for u! go get some rest b4 u continue.. so when's de deadline? will i be able to see ur wrk?
-eve-
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-eve-
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: 5:27 PM
: 5:27 PM 
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