PSYB64H3 Chapter Notes - Chapter 3: Oligodendrocyte, Metabotropic Receptor, Purkinje Cell
23 May 2016
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Week 3 chapter 3: cells of the nervous system. The nervous system is made up of two types of cells: Glia: cells in the nervous system that support the activities of neurons. Neurons: cell of the nervous system that is specialized for information processing and communication. Also contribute to the blood-brain barrier: prevents most toxins circulating in the blood from entering the brain astrocytes cover surface of capillaries. Help guide the regrowth of damaged axons. Multiple sclerosis: involves a progressive degeneration of the myelin on axons of the nervous system. Microglia: tiny, mobile glial cells that migrate to areas of damage/injury and digest the debris. Ion channels: protein structure that allows ions to pass through without the use of additional energy: ion channels have two different types: Voltage-dependent channels: ion channel that opens/closes in response to the local electrical environment. Ligand-gated channel: ion channel in the neural membrane that responds to chemical messengers.
