BIOLOGY 2C03 Lecture Notes - Trpv1, Occipital Lobe, Parietal Lobe
28 Jan 2013
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Synapses: a. p. hits the axon terminal, and the depolarization from voltage-gated na+ channels causes the opening of ca2+ channels, which causes fusion of synaptic vesicles and presynaptic membrane, tetrodotoxin (ttx) blocks voltage-gated na channels, tea blocks k channels. Refractory period: studying the squid giant axon and either removing external na or blocking. Astrocytes: facts, most numerous glial cells, outnumbering neurons 10:1. ii. Schwann cells: myelin-producing cells of the pns. b, myelin divides axons into internodes, paranodes, and nodes of ranvier, na channels are clustered in the initial segment and nodes of ranvier. The spiraled lamellae fuse to form major dense lines, while the membrane faces that can be traced to a potential connection to the extracellular fluid form the intraperiod lines. Innermost lamellae contain the oldest constituents: disease: i. If an axon has degenerated and new regenerating axons are formed, daughter schwann cells provide support for the axonal outgrowth.
