| A | B |
|---|
| regulation | control and coordination of all life activities |
| receptors | specialized structures that are sensitive to changes in the internal and external environment |
| impulses | electrochemical messages |
| effector | muscle or gland in which neurons are attached to |
| stimulus | a change internal or external environment which stimulates an impulse |
| neuron | nerve cells, basic unit of structure and function in the nervous systemand |
| cyton | cell body |
| dendrites | fibers that detect stimuli |
| axon | fibers that detect |
