| A | B |
|---|
| homeostasis | regulation of an organisms' internal life-maintaining conditions |
| neuron | basic functioning units of the nervous system; nerve cells |
| dendrite | part of neuron that receives messages and sends them to the body |
| axon | carry impulses away from the cell body |
| synapse | small space across which an impulse moves from an axon to the dendrites of another neuron |
| central nervous system | made up of the brain and spinal cord |
| peripheral nervous system | made up of all the nerves outside the Central Nervous System |
| Cerebrum | largest part of the brain |
| cerebellum | part of the brain that controls voluntary muscles; helps maintain balance |
| brain stem | connects the brain to the spinal cord |
| reflex | automatic involuntary response to stimulus;controlled by the spinal cord |
| sensory neurons | receives information and sends impulses to the CNS |
| interneurons | relay information between sensory and motor neurons |
| motor neurons | brings impulses to muscles or glands from the spinal cord and brain |
| spinal nerves | nerves that come out from spinal cord |
| impulse | slight electrical current that was sent through neurons |
| stimulus | something that provokes a response |
| retina | tissue at the back of the eye that is sensitive to light energy |
| cochlea | fluid filled structure in the inner ear in which sound vibrations are converted into nerve impulses that are sent to the brain |
| olfactory cells | nasal nerve cell that becomes stimulated by molecules in the air and sends impulses to the brain for interpretation of odors |
| taste buds | major sensory receptors for taste. located on your tongue |
