BIOL3030 Lecture Notes - Lecture 5: Sympathetic Nervous System, Somatic Nervous System, Axon Hillock
4 Apr 2017
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Communicated w effector organ: skelteal muscle by acetocholine (ach) How neruone communicates with other nueron and effector organs. Efferent nueron producing ach at end of terminals: muscle contraction. Ganglion: not straight connector, nexus in btw. Affected by neuroepinephrin not ach: fight or flight: adrenaline: adrenergic. Gets to adrenal medulla more than ganglion. Heart innervated from para and sympathetic depending on homeostatic means. Down nueron, axon, results in neurotransitter release. May induce another nerve potential to travel down post synaptic. Insulatory material that helps prevent form signal from degrading. Axon hillock : connections soma to axon. More ions outside than inside: negative: status of nerve cell. Compared to excell: potential for -70 mv charge. Very thin shell of charge differential for membrane potential. Membrane channels: move ions through membrane: selective. Aa charges around pore can attract spefici ions. Nak atpase: uses atp to power protein conformational change. Negative on the inside: net ionic exchange.
