That would be electric charge 
        
             
        
        
        
A neuron (also known as nerve cell) is an electrically excitable cell that takes up, processes and transmits information through electrical and chemical signals. It is one of the basic elements of the nervous system. In order that a human being can react to his environment, neurons transport stimuli.
 
        
             
        
        
        
Alot of humans might not now they are even harming the systems by smoking or littering.
 
        
             
        
        
        
Boating activities decrease along shorelines :)
        
             
        
        
        
Answer:
 At least 6. You have to look at the chemical formula for cellular respiration and make sure it is balanced!
C6H12O6+6 O2→6 CO2+6 H2O
Explanation: