Electrical
Neurons typically communicate using ___________ signals to communicate within a neuron.
        
             
        
        
        
These <span>large leaves of ferns that show multiple venation are called fronds.</span>
        
                    
             
        
        
        
Answer:
Alveoli
Explanation:
The smallest branches are called bronchioles and at the end of these are your air sacs (alveoli).