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4 Cards in this Set
- Front
- Back
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Glia Cells (HIS BIN) |
- Provide housekeeping - Provide support - Provide nutrition |
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How neurons differ from other body cells |
- Special extensions - Dendrites that bring information into the cell, and axons that send it away |
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Efferent, Afferent & Interneurons |
-Efferent (motor) neurons send messages outward from the nervous system to control muscles - Afferent (sensory) neurons carry messages inward to the nervous system to keep the nervous system informed about the external world and the body’s internal environment - Interneurons carry information from one neuron to another to make local connections |
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The Axon |
Axoplasm fluid inside the axon and extracellular fluid outside contain ions. The axonal membrane contains ion pumps that mostly move Sodium (Na+) out of the axon and Potassium (K+) in, at a ratio of 3 Na+ ions out for every 2 K+ ions in. Ion Channels allow K+ to flow freely into the cell, |
