| A | B |
|---|
| adrenaline | a hormone that gives the body extra energy in times of fright, anger, or excitement |
| axons | the fibers on the nuerons that carry messages away from the cell |
| cerebellum | the part of the brain that controls balance and the working together of muscles |
| cerebrum | the part of the brain that controls voluntary muscle movements, thinking, learning, and the senses |
| dendrites | the fibers on neurons that carry messages into the cell |
| hormones | the chemical messengers in the body that are produced by certain glands |
| medulla | the part of the brain that controls automatic body functions such as involuntray muscle movement |
| neurons | nerve cells throughout the body that carry signals to and from the brain |
| reflex | an automatic and involuntary response to an outside stimulus |
| spinal cord | a rope of neurons that connects the brain and the nervous system |
| synapses | the spaces between neurons |
