Depends on what for, and what you PCP or specialists prescribes. If say you have high blood pressure, and your PCP is giving you both Nitros and aspirins, than yeah sure you can take both (this is the cocktails EMT's use for suspected MI's). However if not otherwise indicated, never. Under. ANY Cirumstance take more two medications at the same time.
:Examine animals to diagnose their health problems
:Diagnose and treat animals for medical conditions
:Treat and dress wounds
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>