NEUR 3200 Lecture Notes - Lecture 9: Cytochrome P450, Choroid Plexus, Neuroglia
31 Oct 2017
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The central and peripheral nervous systems central = brain+ spinal cord. Ach: acetylcholine (in cns, works in cholinergic system as inhibitory neurotransmitter; in pns, stimulates muscles) Fig 2. 25: each hemisphere has four lobes: Parietal, occipital, temporal, and frontal: corpus callosum: neural pathway that connects the two hemispheres. communication. Astrocytes (type of glia) play a key role. Csf houses ions basis of action potentials. Blood-brain barrier prevents harmful substances from entering brain, protects the brain. Doesn"t have its own mechanism to fix neurons/problems, so easier to keep them out altogether (bbb: prevention rather than repair/regeneration (energy-saving) Functional units of the nervous system: chemical and electrical signals. Chemical (neurotransmitters, hormones), electrical (action potentials: glial cells. Multiple functions: provides structural support, nutrients and protection, insulation, myelin production, inflammatory response, inactivating nt"s. Glial cells are more prone to become cancerous rather than neuronal cells because neurons are post-mytotic.
