| A | B |
|---|
| Receptors | specialized structures that are sensitive to changes in the environment |
| Neurons | the basic unit of structure and function in the nervous system |
| Effectors | Muscles or glands that the neurons are attached to |
| Regulation | the control & coordination of all life activities |
| Stimulus | change in the environment that initiates an impulse |
| Impulse | an electrochemical message |
| Cyton | the cell body |
| Axon | fiber that transmits the impulse away from the cyton & towards the end of the terminal branches |
| Terminal Branches | the ends of axons that secrete neurotransmitters |
| Synapse | the gap between the terminal branches of one neuron and the dendrites of another neuron |
| Neurotransmitters | chemicals secreted by the terminal branches that aid in the tranmision of an impulse across the synapse |
| Sensory Neurons | carry impulses from receptors toward the spinal cord and brain |
| Motor Neurons | carry impulses from the brain and spinal cord toward effectors |
| Interneurons | relay impulses from one neuron to another in the brain and spinal cord |
| Nerves | bundles of axons that are bound together by connective tissue |
| Sensory Nerves | composed only of dendrites or sensory neurons |
| Motor Nerve | contain only the axons of motor neurons |
