1. Stimulus- an action or response, like the ringing of your alarm clock if you didn't sleep through it.2. Effector - a body part or cell that reacts to a stimulus in a particular way.3. Sensory neuron - a nerve cell that conducts impulses from a sense organ to the central nervous system.4. Associative neuron - anervecell found within the central nervous system that links sensoryand motorneurons.5. Motor neuron a neuronthat conveys impulses from the central nervous system to a muscle, gland, or other effector tissue.6. Synapse - the junction across which a nerve impulse passes from an axon terminal to a neuron, muscle cell, or gland cell.7. Dendrite - any of the threadlike extensions of the cytoplasm of a neuron; they typically branch into treelike processes, and compose most of the receptive surface of a neuron.8. Axon - a long fiber of a nerve cell (a neuron) that acts somewhat like a fiber-optic cable carrying outgoing (efferent) messages.9. Nucleus - cell nucleus; a spheroid body within a cell, contained in a double membrane, the nuclear envelope, and containing the CHROMOSOMES andone or more nucleoli. The contents are collectively referred to as nucleoplasm.10. Cell body - thepartofthecellcontainingthenucleus.11. Glial cells - are non neuronal cells that maintain homeostasis, form myelin, and provide support and protection for neurons in the brain and peripheral nervous system.12. Impulse something that changes the momentum of an object; the integral of a force with respect to time