Answer:When neurons communicate, an electrical impulse triggers the release of neurotransmitters from the axon into the synapse. The neurotransmitters cross the synapse and bind to special molecules on the other side, called receptors. Receptors are located on the dendrites. Receptors receive and process the message.
Explanation:
 
        
             
        
        
        
Insulin undergoes extensive posttranslational modification along the production pathway.
        
             
        
        
        
Answer:
The study of anything basically. It is learing new things by observation, experiments, facts, principle, and hypothesis. 
 
        
                    
             
        
        
        
Answer:
Examples of biotic factors are animals, birds, plants, fungi, and other similar organisms. Introduction In ecology and biology, abiotic components are non-living chemical and physical factors in the environment which affect ecosystems
 
        
             
        
        
        
Answer:
hepatitis A is the only one