| Don't Be Nervous | Name:__________________ |
| _____ | afferent neurons | 1) bundles of cell bodies outside of the CNS. |
| _____ | autonomic nervous system | 2) Potassium ions inside the plasma membrane and sodium ions are outside. |
| _____ | axon | 3) similar to the insulation of an electrical wire. |
| _____ | central nervous system | 4) largest part of the brain |
| _____ | cerebellum | 5) control of involuntary actions |
| _____ | cerebrum | 6) transmit impulses to the cell body of a neuron |
| _____ | dendrites | 7) comprised of the brain and spinal cord. |
| _____ | depolarization | 8) allows the control of skeletal muscles. |
| _____ | efferent neurons | 9) similar to the body's "autopilot". |
| _____ | ganglion | 10) indentations in the myelin |
| _____ | myelin | 11) the membrane returns to its normal or polarized state. |
| _____ | nodes of Ranvier | 12) sodium gates open and sodium ions rush into the neuron. |
| _____ | polarization | 13) transmit impulses away from the CNS to an effector. |
| _____ | repolarization | 14) similar to a conductor in a electrical wire. |
| _____ | somatic nervous system | 15) a small gap between the presynaptic and postsynaptic membranes. |
| _____ | synapse | 16) those that take impulses toward the CNS |
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