nozzle control
Some drugs increase/decrease the amount of neurotransmitters released by neurons. (ex. the venom of a black widow spider causes acetylcholine to be released continuously by motor neurons, causing muscle spasms).
spilled juice
some drugs may effect the length of time the neurotransmitter remains in the synaptic gap
hey look, a bird! huh, where? *stands infront of the neurotransmitter*
some drugs can prolong the effects of a neurotransmitter by blocking the reuptake(being put away/reabsorbtion) of the neurotransmitter.
doppleganger
some drugs can mimic specific neurotransmitters, and because of being chemically similar, may produce its same effect (ex. nicotine is chemically similar to acetylcholine and can occupy its receptor sites, stimulating skeletal muscles and increasing the heart beat)
the winnie-the-pooh effect
some drugs can block the effect of a neurotransmitter by fitting into receptor sites and preventing it from acting (ex. the drug curare blocks acetylcholine receptor sites, causing almost instant paralysis. So even though the brain sends signals to the motor neurons, they can't respond in turn.)
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