Skip to Content
Medical Term:


Pronunciation: rē-spons′


  1. The reaction of a muscle, nerve, gland, or other excitable tissue to a stimulus.
  2. Any act or behavior, or its constituents, that a living organism is capable of emitting. Reflexes are usually excluded because they are typically elicited by a specifiable (unconditioned or natural) stimulus rather than emitted under circumstances in which the stimulus was not specifiable.

[L. responsus, an answer]