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Cardiovascular
| Term | Definition |
|---|---|
| Afferent nerves | Nerves that carry sensory signals (nerve impulses) toward the central nervous from the periphery |
| Aphasia | loss of language function |
| Arachnoid mater | Middle layer of the meninges naped for the spider-web-like trabeculae that extend between it and the pia mater |
| Astrocyte | Glial cell type of the central nervous system that provides support for neurons and maintains the blood-brain barrier |
| Autonomic nervous system (ANS) | functional division of the nervous system that is responsible for homestatic reflexes that coordinate control of cardiac and smooth muscle, as well as glandular tissue |
| Axon | Single process of the neuron that carries an electrical signal (action potential) away from the cell body toward a target cell |
| axon hillock | tapering of the neuron cell body that gives rise to the axon |
| axon segment | single stretch of the axon insulated by myelin and bounded by nodes of ranvier at either end (except for the first, which is after the initial segment, and the last, which is followed by the axon terminal) |