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Samenvatting Anatomie & Fysiologie: Het Endocrien Stelsel

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Een samenvatting van het onderdeel 'het hormoonstelsel' van anatomie en fysiologie

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Uploaded on
January 31, 2023
Number of pages
20
Written in
2022/2023
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Summary

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Het hormoonstelsel

,Introductie
 Endocrien stelsel 30-tal chemische stoffen/hormonen
 Behoort tot regulerende stelsels
o Hormoonstelsel via stof (bloedbaan)
o Zenuwstelsel via kabels
o Neuro-endocrien systeem
o Belangrijke rol bij handhaven van homeostase
 Zenuwstelsel snelle reacties
 Hormoonstelsel reageert trager, maar verandering duurt langer
 2 verschillende producenten
o Endocriene klieren
o Weefselhormonen
 Specifieke weefsels die in staat zijn om hormonen te produceren
 Worden lokaal vrijgegeven en gaan ook lokaal werken
 Doel = cel laten functioneren
 Hormonen verplaatsen zich via de bloedbaan
o Afgifte door de hormoonproducent
o Vervoer via bloed naar de doelcel
 Is geproduceerd voor een specifieke receptor op de doelcel en kan dus enkel
op die cel waarop de receptor zit, inwerken



Zenuw vs endocrien/hormoon stelsel
 Werking berust op de afgifte van chemische stoffen die zich binden aan specifieke
receptoren op doelcellen
 Beide stelsels hebben verschillende chemische signaalstoffen gemeenschappelijk
o Afgifte ter hoogte van de synaps neurotransmitter (zenuwstelsel)
o Afgifte ter hoogte van de bloedbaan hormoon (hormoonstelsel)
o Soms zelfde benaming van de afgegeven stof adrenaline en noradrenaline
 Beide stelsels worden gereguleerd via een negatieve terugkoppeling
 Doel = homeostase te handhaven
 Neurotransmitter en hormoon werken beide in op de homeostase

,

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