| A | B |
|---|
| central nervous system | brain & spinal cord |
| peripheral nervous system | sensory and motor nerves |
| afferent division | transmits information gathered from the body and viscera |
| efferent division | transmits information from the CNS to effector organs |
| somatic nervous system | voluntary nervous system |
| autonomic nervous system | involuntary nervous system |
| controls smooth muscle, the heart and glands | autonomic nervous system |
| controls skeletal muscle | somatic nervous system |
| sympathetic nervous system | fight or flight response |
| parasympathetic nervous system | rest and digest response |
| astrocytes | support & anchor neurons to the blood supply, clean the chemical environment |
| microglia | maintain the health of neurons |
| ependymal cells | line the central cavities of the brain and spinal cord |
| helps to circulate cerebrospinal fluid | ependymal cells |
| oligodendrocytes | produce myelin sheaths in the CNS |
| satellite cells | surround neuron cell bodies with ganglia in the PNS |
| schwann cells | form myelin sheaths in the PNS |
| neurons | conduct messages, extreme longevity, amitoic, high metabolic rate |
| nuclei | cluster of cell bodies in the CNS |
| ganglia | clusters of cell bodies in the PNS |
| tracts | bundles of neuron processes in the CNS |
| nerves | bundles of neuron processes in the PNS |
| white matter | myelinated fibers |
| gray matter | nerve cell bodies and unmyelinated fibers |
| multipolar neuron | a neuron with more than 3 processes |
| bipolar neuron | a neuron with 2 processes: axon and dendrite |
| unipolar neuron | a neuron with a short single process |
| afferent neuron | transmit messages from sensory receptors to the CNS |
| efferent neuron | carry impulses away from the CNS |
| interneurons | lie between motor and sensory neurons |
