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>
Im not quite sure, but I think its either A or B, most likely A though
To lose weight and build muscle strength the best thing to do is lift weights.
Environmental Tobacco Smoke (ETS).
The answer is 62.5 because 62.5 is half of 125