excitable
adjective
                                                                                                                            
                                                            ex·cit·able
                    
                                                                                                              
                                                                                                                                  ik-ˈsī-tə-bəl  
                                                      
                                                          
            1
                    
                                          
              
          
                                                      : capable of being readily roused into action or a state of excitement or irritability                                      
                
                    
2
                    
                                          
              
          
                                                      : capable of being activated by and reacting to stimuli                                      
              
                             
excitable cells
                         
                
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  Merriam-Webster unabridged




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