excitable

adjective

1. easily excited: Prima donnas had the reputation of being excitable and temperamental.
2. capable of being excited.

adjective

1. easily excited; volatile
2. (esp of a nerve) ready to respond to a stimulus

adj.

c.1600, from Late Latin excitabilis “inciting, animating,” from excitare (see excite). Related: Excitability.

adj.

1. Capable of reacting to a stimulus. Used of a tissue, cell, or cell membrane.
2. Capable of emotional arousal.