ANAT 101 Lecture Notes - Lecture 18: Voltage-Gated Potassium Channel, Resting Potential, Peripheral Nervous System
16 Mar 2016
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Integraive (analyze sensory informaion, store some, and make decisions in what acions to take. Everything else (cranial nerves, spinal nerves, ganglia, enteric plexuses in small intesine, sensory receptors in skin) 6 types if neuroglia (4 in cns & 2 in pns) - only oligodendrocytes & schwan cells can use myelinaion o. Ependymal cells: in brain and spinal chord - helps produce, circulate, and monitor cerebrospinal luid. Astrocytes: maintain blood-brain barrier (blood is toxic to the brain and helps them not interact), help form scar issue ater injury, regulates ions, and provides structural support. Microglia: remove cell debris, wastes, & pathogens by phagocytosis. Satellite cells: surround neuron cell bodies of the ganglia, help regulate o2, co2, nutrients and neurotransmiter levels. Schwan cells: surround all axons in pns, help in repairs ater injury - when it myelinates an axon, it only covers one completely, but if it covers muliple, it"s sill considered unmyelinated.
