| A | B |
|---|
| Receptors | specialized structures that are sensitive to changes in the external and internal environment |
| Neurons | are nerve cells / they are the basic unit of structure and function in the nervous system |
| Effectors | are muscles or glands that neurons are attached to |
| impulse | electrochemical message |
| stimulus | is a change in the internal or external environment |
| receptors | structures that are specialized to detect stimuli |
| dendrites | fibers that detect stimuli and and generate an impulse toward the cyton |
| axon | a fiber that transmits the impulse away from the cyton and towards the terminal branches |
| cyton | known as the cell body |
| synapses | gaps between terminal branches of one neuron and the dendrites of another neuron |
| neurotransmitters | chemicals secreted by the terminal branches that aid in the transmission of an impulse across the synapse |
| sensory neuron | carry impulses from the receptors to the spinall chord and brain |
| interneuron | relay impulses from one neuron to another |
| motor neuron | carry impulses from from brain to spinal chord toward the effectors |
