| A | B |
|---|
| Regulation | l Is the control and coordination of all life activities |
| Receptors | specialized structures that are sensitive to changes in the external and internal environment |
| Neurons | nerve cells |
| Effectors | l Are muscles or glands in which neurons are attached to |
| The Neuron | l Neurons are used for the transmission of impulses from one part of the body to another |
| Dendrites | l Fibers that detect stimuli and generate an impulse toward the cyton |
| Cyton | Known as the cell body |
| Axon | fiber that transmits the impulse away from the cyton and towards the terminal branches |
| Terminal Branches | ends of axons that secrete neurotransmitters |
| Synapse | l The gap between the terminal branches of 1 neuron and the dendrites of another neuron. |
| Neurotransmitters | l Chemicals secreted by the terminal branches that aid in the transmission of an impulse across the synapse |
| Hydra | l Contains no brain or control center, so impulses travel in all directions across a nerve net |
