Neurotransmitters are naturally occurring substances in the body. Those that have similar effects as narcotics are called endorphins. Endorphins are responsible for the feeling known as "runner's high".
neurotransmitters
SA node effects which neurotransmitter?
The neurotransmitters from one neuron have direct effect on the next neuron. They are channels that are used to transmit messages in the nerves.
Hormones and neurotransmitters
Anti-psychotic
Marijuana is considered agonistic- it enhances the effects of neurotransmitters.
REUPTAKE
This class of neurotransmitters is called endorphins.
Link provided to mindfullnes research at Wikipedia.
These are typically known as neuromodulators; they can either change the rate at which a neurotransmitter is released, or alter the response to a certain neurotransmitters.
Research on neurotransmitters indicates that their function can be enhanced or inhibited by certain substances. Inhibitors are called depressants while enhancers are called stimulants.
Neurotransmitters, enzymes or hormones