I need to know more about rhetoric. For whatever reason, i'm currently focussing much more on the human interactions between people than the things. I'd like to pin down what's going on in that it may be psychosomatic, or rather, psychopsychic, but it's there. Rather more hinges on this than usual because the truth would almost certainly be relevant to difference feminism. If i really am changing my perspective on the world pharmacologically through the stimulation of my oestrogen receptors, and if it really is becoming more anthropocentric, that's a major paradigm shift for me, or at least a vindication. I also wonder about my endocrine system.
On with the videos though:
A purified drug works like a key in a lock, the lock being the receptor for the drug, which is rather like a sensor. They can be defined as substances which have an action on the body, although this is such a loose definition that it could be applied to a granite boulder falling on the head. Extending the key analogy, some drugs unlock the locks and others get stuck in the locks and prevent them from unlocking. Caffeine, warfarin and coumarin are in the latter category. Other "keys" work better than the real key, one example being heroin, which is more fat-soluble but would be digested if swallowed, rendering it no more effective than morphine, so it has to be injected. This leads to the major problems of the introduction of foreign insoluble matter into the bloodstream along with various substances which don't belong there and unsafe methods of injection.
Dependence, or addiction, is caused by the drug leading to the body becoming "lazy" and relying on the drug, a possible problem with Echinacea for example. This means that when the drug is no longer available, the body has trouble readjusting.
This is all rather a sketchy view of drugs, so i'll make a more complete one later. Sorry about that.
I think what i may have done here is confuse AQA IGCSE Science with Biology. Also, this feels incredibly light and sketchy to me, but maybe it's because it's so much my home territory. It feels like i'm saying nothing new at all. I'll have to have another go at this because of its lack of substance.
Tomorrow, i think i'll add to the Aliens playlist.