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Samenvatting pancreas en schildklier

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uitwerking college pancreas en schildklier

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Hormonen schildklier en pancreas
Hormonen reguleren de stofwisseling op lange termijn en lange afstand.
Hormonen werken op endocriene cellen of weefsels

Doelcellen= cellen in de periferie (lichaam) die op een specifiek hormoon kunnen reageren
Hormoonreceptor
Een eiwit die zich bevindt in het cytoplasma of de celkern of het celmembraan waaraan een
bepaald hormoon zicht bindt om zijn werking in gang te zetten
Hormonen worden verspreid via bloedvaten;
- meeste circuleren vrij in oplossing
- steroïden en schildklierhormonen binden zich aan bloedeiwitten (albumine) voor
vervoer.
Hormonen worden geïnactiveerd door:
- Zich aan receptoren te binden
- Verwijdering door lever en nieren
- Afbraak door extracellulaire enzymen

Hypothalamus produceert:
- ADH en oxytocine
- Hypothalamus geeft regulerende hormonen af die de hypofyse stimuleren tot
hormoonafgifte
- De hypothalamus reguleert de afgifte adrenaline reguleren uit het beenmerg
Hypofyse
Voorkwab (adenohypofyse) achterkwab (neurohypofyse)
TSH ADH
ACTH Oxytocine
LH
FSH
Prolactine
Groeihormoon
MSH

TSH
Stimuleert de afgifte van schildklierhormonen
Groeihormoon
Stimuleert de lengtegroei

Hypofyseachterkwab geeft hormonen van de hypothalamus af
ADH
- vermindert waterverlies via urine
- vergroot de dorstprikkel
Oxytocine
- Stimuleert concentraties baarmoeder tijdens bevalling en stimuleert de contractie
cellen in de borstklieren tot melkafgifte.
- Aandoeningen van endocrien weefsel leiden tot overproductie of onderproductie.

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Uploaded on
August 29, 2023
Number of pages
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Written in
2019/2020
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