KNES 259 Lecture Notes - Lecture 22: Inhibitory Postsynaptic Potential, Excitatory Postsynaptic Potential, Slow-Wave Sleep

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Knes 259 lecture 22 the nervous system. Afferent: the axon of the ascending neuron (ie. sensory: dendrites are located in the peripheral nervous system, terminal end located in central nervous system. Efferent: the axon of the descending neuron (ie. motor: dendrites are located in the central nervous system, terminal end located in peripheral nervous system, only autonomic nerves have synapses (ganglia) outside of the cns. Interneuron: located in the central nervous system: the majority of all neurons. Glial cells: support cells (non-neuronal cells that maintain homeostasis, form myelin, and provide support/protection for neurons in cns and pns) Cannot generate action potentials but do have a resting potential. Astrocytes: neuroglia, holds neurons in place, most common, responsible for metabolic support and repair. Ependymal: secretes csf (csf used for shock absorption and supplies nutrients, forms the blood-brain barrier (tight junctions; co2 can move across but h+ ions cannot) Oliogodendrocytes: secretes myelin in the cns. Schwann: secretes myelin in the pns.

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