PSYB65H3 Lecture Notes - Lecture 3: Golgi'S Method, Bipolar Neuron, Golgi Apparatus
15 Oct 2014
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Historical contributions: debate in early 20th century: how ns operated @ microscopic lvl, golgi: ns is composed of network of interconnected fibers ( nerve net ) Came up w/ golgi stain: cajal: neuron hypothesis: there are individual neuron cells. Applied golgi stain (cid:0) proved golgi wrong: cells are distinct & indiv but growing together: as time & tech progressed, more strategies & concepts on understanding ns, e. g. staining processes. Neurons: we all start off as stem cells (cid:0) proliferate into diff types (glial cells, neurons, what makes cells diff: their purpose. Info = neurotransmitters: directly communicating w/ membrn of dendrites: cell body contain all the organelles (esp. nucleus), programmed by dna, contain spec protein for spec neuron type, integrating info. : info processed, analyze whether/not signal is strong enough to be fired: axon hillock extension of cell body: gate to propagate membrane potentials from synaptic inputs (cid:0) transmit to axon, connects to axons (e. g. collateral)
