The correct answer is by using the antagonist.
The antagonist is a molecule that blocks a biological response by binding to the receptor. So, you add antagonists to the receptors you want to determine and see which antagonist blocked the response. By blocking the specific response you can get the answer what receptor it was.
 
        
             
        
        
        
Answer:
h7rhocrbix rcrcrxineox rx ex e crc
rxnrikcjricrc
Explanation:
deibzienizjei xebiebsie is i3 she su 3u d4
 
        
             
        
        
        
Answer:
Divergent plate boundaries because the separating of the tectonic plates allows for the lava to push its way through the rift and escape to Earth's surface. 
 
        
             
        
        
        
<span>Carbon is the building blocks of all living molecules. With the ability to form carbon-carbon bonds, many different compounds formed into different structures can be used for different purposes such as macromolecules.  </span>