PSYB64H3 Chapter Notes - Chapter 3: Neuroglia, Schwann Cell, Astrocyte
Document Summary
Chapter 3: neurophysiology: the structure and function of the cells of the nervous system. The ns is made up of two types of cells, glia and neurons. Glia support fn; neurons information processing and communication fn. They are generally categorized by size: macroglia, microglia. There are 3 primary types of macroglia: astrocyte, oligodendrocyte (supply myelin, schwann cells (supply myelin) Starlike shape; most common type of glia found in the brain. Astrocytes form close connections w/ the capillary cells of the brain, forming neurovascular units. They form close connections to transfer nutrients to the neurons. Astrocyte contribute to the protective blood- brain barrier blocks the movement of some circulating toxins into neural tissues. Astrocytes surround and isolate the area of the synapse; they keep neurochemicals from moving outside a restricted area. Astrocytes can clear molecules, such as potassium, from the synaptic gap. Astrocytes play an active role in chemical signaling that occurs in the brain.
