BI - Biology BI 201 Lecture Notes - Lecture 16: Nicotinic Acetylcholine Receptor, Axon Terminal, Microglia
26 Oct 2016
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Nissl body (or rough er: classification of neurons, bipolar. Rare (retina, inner ear, olfactory: unipolar. Most in the cns: neuroglial cells , astrocytes (star-shaped, produce neurotransmitters, regulate k+ ion, bind blood vessels & neurons (support, microglia, small (duh! ), phagocytic cells: ependymal cells (ciliated, cuboidal/columnar epithelial cells, produce/circulate cerebral spinal fluid (csf, oligodendricytes (star-shaped kinda, support/connect, secrete myelin for cns neurons, schwann cells, flattened, wrapping cells, form myelin sheath for pns. Neurolemma = cell body with cytoplasm, organelles, etc. Functions to increase speed of impulse conduction (150x faster) Nodes of ranvier = gaps in the myelin sheath. Ability to move through the cell membrane (membrane permeability) Concentration of ions (inside & outside of the cell) Charge (inside & outside of the cell) Can be degraded by enzymes in the synaptic cleft. Can be removed from the synaptic cleft. Neuropeptides are responsible for mediating sensory and emotional responses including hunger, thirst, sex drive, pleasure and pain: acetylcholine (ach)
