responsive

Adjective

• reacting to a stimulus
  • the skin of old persons is less reactive than that of younger persons
    

• readily reacting or replying to people or events or stimuli; showing emotion
  • children are often the quickest and most responsive members of the audience
    

• containing or using responses; alternating
  • responsive reading
    
  • antiphonal laughter
    

Related words

• Synonyms: 
  reactive , antiphonal