I believe c is the correct answer.
I think it might be C if not then B but I would go with C
Sorry if I got it wrong
The answer to this question would be: <span>B. Receptor site
The receptor site of a neurotransmitter often only receives a specific kind of transmitter. That was because the receptor has a unique 3D structure, so different transmitter wouldn't fit into the receptor. That was similar to lock and key principles.</span>
why is use of the club drug rohynol considered <em>an club drug</em>
