| A | B |
|---|
| parietal lobe | lobe of the cerebrum concerned primarily with somatosensory function |
| peripheral nervous system | nerves and gnaglia that lie outside the central nervous system |
| plexus | network of nerves such as the cervcal plexus |
| parasympathetic nervous system | division of the autonomic nervous system concerned with "feeding and breeding" |
| preganglionic fiber | a neuron that transmits action potentials from the central nervous system to a ganglion |
| postganglionic fibers | a neuron that transmits action potentials from a ganglion to a distal target organ |
| repolarization | return of the membrane potential to its resting state after the nerve impulse |
| reticular formation | complex network of nerve fibers that arises within the brain stem and projects into the lower cerebrum; causes arousal of the cerebrum so that the person does not slip into a coma |
| reflex arc | a nerve pathway that includes a receptor, sensory neuron, interneuron, motor neuron, and effector organ |
| synapse | the interaction between two nerves where chemical transmission of the electrical signal occurs |
| sensory nerves | collection of sensory neurons that carry information toward the central nervous system |
| spinal nerves | nerve that arises from the spinal cord |
| sympathetic nervous system | a division of the autonomic nervous system that causes the fight-or-flight response thoracolumbar outflow |
| temporal lobe | lobe of the cerebrum responsible for hearing, smelling, speech, and memory |
| thoracolumbar outflow | sympathetic nerve activity; fight-or-flight response |
| white matter | myelinated fibers, mostly axons, located in the central nervous system |
