| A | B |
|---|
| motor neuron | a neuron tha t sends an impulse to a muscle or a gland |
| synapse | a junction where one neuron can transfer an impulse to the next structure |
| stimulus | any change or signal in the environment that can make an organism react in some way |
| response | what the body does in reaction to a stimulus |
| neuron | a cell that carries information through the nervous system |
| nerve impulse | a message carried by a neuron |
| dendrite | a thread-like extension of aneuron that carries nerve impulses TOWARD the cell body |
| axon | a thread-like extension of a neuron that carries nerve impulses AWAY from the cell body |
| nerve | a bundle of nerve fibers |
| sensory neuron | a neuron that picks up stimuli form the internal and external environment and converts each stimulus into a nerve impulse |
| interneuron | a neuron that carries nerve impulses from one neuron to another |
| central nervous system | the division of the nervous system that consists of the brain and spinal cord |
| peripheral nervous system | the division of the nervous system that consists of the all the nerves oustide the central nervous system |
| brain | the organ that controls most functions of the body, protected by the skull |
| spinal cord | the thick column of nervous tissue that links the brain to most of the nerves in the peripheral nervous system |
| cerebellum | part of the brain that coordinates the actions of the muscles and helps maintain balance |
| cerebrum | part of hte brain that interprets input from the senses, controls movements and carries out complex mental functions |
| brain stem | the part of the brain that lies between the cerebellum and spinal cord; controls the body's involuntary actions |
| somatic nervous system | group of nerves in the peripheral nervous system that control voluntary actions |
| autonomic nervous system | group of nerves in the peripheral nervous system that control involuntary actions |
| reflex | automatic response that occurs rapidly and without conscious thought |
| concussion | a bruiselike injury of the brain that occurswhen the softtissue of the brain collides with the skull |
