The ability of a muscle to receive and respond to stimuli.
In psychology, the ability to respond to stimuli.
The state of being irritable.
The property of certain kinds of tissue that enables them to respond in a specific way to outside stimuli. Irritability is shown by nerve cells, which can generate and transmit electrical impulses when stimulated appropriately, and by muscle cells, which contract when stimulated by nerve impulses.
The ability of living organisms to respond to specific stimuli with distinct actions.
The condition of being overly reactive to minor stimuli; heightened sensitivity.