| A | B |
|---|
| stimulus | any change that can produce a response |
| homeostasis | the ability to maintain constant conditions |
| neurons | nerve cells |
| dendrites | part of the neuron that receives messages |
| axon | a long structure that carries message away from neuron |
| synapse | the place where two neurons meet |
| cerebrum | largest part of brain; controls thinking, senses, memory |
| cerebellum | second largest part of brain; controls movement, balance |
| medulla | controls involuntary actions |
| reflex | an involuntary, automatic response to a stimulus |
| retina | tissue at the back of the eye that is sensitive to light; contains rods & cones |
| cones | cells in retinea that respond to bright light and color |
| rods | cells on retina that respond to dim light |
| cornea | transparent covering of eye |
| optic nerve | a nerve that connects eye and brain |
