| A | B |
|---|
| receptors | special organs that receive stimuli from the environment |
| illusion | a false mental picture |
| reflex | an automatic response to a stimulus |
| reflex arc | the path of a message in a reflex |
| conditioned response | a learned response in which one stimulus takes the place of another |
| cerebrum | the part of the brain that controls the senses and thinking |
| cerebellum | the part of the brain that controls balance and body motion |
| medulla | the part of the brain that controls heartbeat and breathing rate |
| concentrate | bring thoughts together |
| memorize | learn something by studying it or repeating it until you remember it all |
