| A | B |
|---|
| regulation | is the control and coordinaton of all life activities |
| receptors | specialized structures that are senstive to changes in the external and internal environment |
| neurons | (nerve cells) the basic unit of and function of living things in the nervous system |
| effectors | are muscles or glands in which neurons are attached to |
| impulse | electromechanical message |
| stimulus | is the canhge in the external or internal environment |
| receptors | structures thast are specialized to detect stimuli |
| dendrites | fibers that detect stimuli and generate an impulse toeward the cyton |
| cell body (cyton) | contains the nucleus of the neuron. |
| axon | a fiber that transmitts the impulses away from the cyton and towards the terminal branches |
| synapse | the gap between terminal branches of one nerve and the dendrites of the next |
| neurotransmitters | chemicals secreted by the terminal branches that aid in the transmiissions of an impulse across the synapse |
| sensory neuron | carry impulses from the receptors toward the spinal cord and the brain |
| interneurons | relay impulses from one neuron to another found in thespinal cord |
| motor neurons | carry impulses from brain and spinal cord toward the effectors |
| nerve | a bundle of axons that are bound together by connective tissue |
| sensory nerve | a nerve containing the axons of sensory neurons only |
