| A | B |
|---|
| Regulation | is the control coordination |
| receptors | Are specialized structures that are sensitive to changes in the external and internal environment |
| Neurons | Are nerve cells,l The neuron is the basic unit of structure and function in the nervous system |
| Effectors | Are muscles or glands in which neurons are attached to |
| Dendrites | Fibers that detect stimuli and generate an impulse toward the cyton |
| Cyton | known as the cell body, Contains the nucleus of the neuron |
| Axon | l A fiber that transmits the impulse away from the cyton and towards the terminal branches |
| Terminal Branches | l The 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 | Contains no brain or control center, so impulses travel in all directions across a nerve net |
| motor nueron | carry impulses from the brain and spinal cord toward the effectors |
| Effector | is a muscle or gland |
