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Samenvatting Middelen bij autonome zenuwtselsel
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Farmacologie medische wetenschappen
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MEDISCHE WETENSCHA¨PPEN: FARMACOLOGIEMIDDELEN DIE AUTONOME ZENUWSTELSEL BEINVLOEDEN
1. IMPULSOVERDRACHT
Zenuwen opgebouwd uit neuronen
Zenuwprikkels of actiepotentialen gaan van ene neuron naar andere tot een eindorgaan
Neuron geleidt zenuwprikkel
Aan einde neuron zit synaps neuron maakt contact met ontvangend neuron
Neurotransmitters worden in presynaptische cel geproduceerd en opgeslagen in blaasjes
aan eindknopje
Neurotransmitters:
Als actiepotentiaal eindknopje bereikt gaat er
neurotransmitter vrij in synaptische spleet
Neurotransmitters binden op neuron als er genoeg
zijn wordt signaal naar postsynaptische cel
Genoeg neurotransmitters voor signaal exciterende
neurotransmitter
Signaal afremmen en weg van impuls remmen
inhiberende neurotransmitter
Prikkeloverdracht aan eindorgaan:
Neuron geleidt actiepotentiaal aan synaps maakt het contact met cellen van eindorgaan
Presynaptisch neuron geeft neurotransmitters af aan synaps
Deze gaan binden op cellen van eindorgaan spieren ontspannen of samentrekken
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