CSB332H1 Lecture Notes - Lecture 3: Radial Glial Cell, Neuroglia, Neurotransmitter
16 Jan 2014
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Document Summary
Myelination in the pns (e. g. , sensory neurons, motor neurons: oligodendrocytes. Myelination in the cns (e. g. , brain: fibrous and protoplasmic astrocytes. Forms the blood-brain barrier: blood-brain barrier, ependymal cells, microglia. Lining the inner brain surface in the ventricles. Activated in response to inflammation: radial glial cells. Guide the migration of neurons during development. Important for the development of the nervous system. Acts as bridges for developing neurons to migrate from one point to another during embryonic development of the nervous system. There is a difference between glial cells and neurons in terms of electrical functioning: glial cells don"t fire action potentials, but similar to neurons, they get depolarized and hyperpolarized. The resting membrane potential can become depolarized or hyperpolarized: this is because glial cells contain high quantities of leaky k+ channels in its plasma membrane. In neurons, there are a lot of voltage-gated k+, na+, and cl- channels.
