Answer:
first one B second one A 
Explanation:
PLS MARK ME AS BRAINLYEST 
 
        
             
        
        
        
Answer:
emphysema : a chronic, irreversible disease of the lungs characterized by abnormal enlargement of air spaces in the lungs accompanied by destruction of the tissue lining the walls of the air spaces.
Explanation:
this is its name and definition
 
        
                    
             
        
        
        
Answer:
sure
but what is that u need help with
Explanation:
 
        
             
        
        
        
Answer:
What are the options? If I had to guess NaOH+H2 Na+H2O
Explanation:
 
        
             
        
        
        
The correct answer is: prevent reception of a signal in a receiving neuron
Neurotransmitters are signal molecules or chemical messengers which transmit signals across a chemical synapse. Neurotransmitters send the signal, from one neuron (nerve cell) to another neuron, from neuron to muscle cell (motor plate), or from neuron to gland cell.
Drugs that bind to neurotransmitter’s receptor can have two effects on its action:
•	Antagonists-they bind to receptor and thus prevent a neurotransmitter from binding to it
•	Agonists-they bind to receptor and mimic the normal neurotransmitter (have the same effect as neurotransmitter).