| A | B |
|---|
| Regulation | The control and coordination of all life activities. |
| Receptors | Specialized structures that are sensitive to changes in the external and internal environment. |
| Impulses | Electrochemical message. |
| Effector | Muscles or glands in which neurons are attached to. |
| Stimulus | A change in the external or internal environment which initiates an impulse. |
| Neuron | Basic unit of structure and function in the nervus system. |
| Cyton | Cell body. |
| Dendrites | Fibers that detect stimuli and generate an impulse toward the cyton. |
| Axon | Fiber that transmits the impulse away from the terminal branches. |
| Synapse | The gap between the terminal branches of 1 neuron, and the dendrites of another neuron. |
| Sensory Neurons | Carries impulses from the receptors toward the spinal cord and brain. |
| Motor Neurons | Carries impulses from brain and spinal cord toward the effectors. |
| Interneurons | Relay impulses from one neuron to another. |
| Nerves | Also called a neuron. |
| Sensory Nerve | Composed only of the dendrites of sensory neurons. |
| Motor Nerve | Contain only the axons of motor neurons. |
| Neurotransmitter | Chemicals secreted by the terminal branches that aid in the transmission of an impulse across the synapse. |
