Terms : Hide Images
| 7498007839 | Neuron | a nerve cell; the basic building block of the nervous system | 0 | |
| 7498007840 | Soma | Cell life,support center | 1 | |
| 7498007841 | Dendrites | Branchlike parts of a neuron that are specialized to receive information. | 2 | |
| 7498007842 | Axons | Carry impulses away from the cell body | 3 | |
| 7498007843 | neural impulse | Electrical signal traveling down the axon | 4 | |
| 7498007844 | myelin sheath | covers the axon of some neurons and helps speed neural impulses | 5 | |
| 7498007845 | terminal branches | form junctions with other cells | 6 | |
| 7498007846 | Ions | positively and negatively charged atoms | 7 | |
| 7498007847 | action potential | A neural impulse; a brief electrical charge that travels down an axon. | 8 | |
| 7498007848 | Depolarization | voltage change that occurs when the difference in charge across a membrane decreases | 9 | |
| 7498007849 | Hyperpolarization | membrane potential becomes more negative | 10 | |
| 7498007850 | Threshold stimulus | stimulation level that must be exceeded to elicit a nerve impulse or a muscle contraction | 11 | |
| 7498007851 | refractory period | resting time; occurs in both neuron firing and in human sexual response | 12 | |
| 7498007852 | sodium-potassium pump | a carrier protein that actively transports K+ ions into and Na+ ions out of cells | 13 | |
| 7498007853 | All or none response | a neuron's reaction of either firing (with a full-strength response) or not firing. | 14 | |
| 7498007854 | Astrocytes | Provide structural and metabolic support for neurons. | 15 | |
| 7498007855 | Synapse | A junction where information is transmitted from one neuron to the next. | 16 | |
| 7498007856 | resting potential | electrical charge across the cell membrane of a resting neuron | 17 |
