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Samenvatting Middelen bij autonome zenuwtselsel

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Farmacologie medische wetenschappen

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MEDISCHE WETENSCHA¨PPEN: FARMACOLOGIE
MIDDELEN 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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