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Samenvatting Maag Darm Lever werkcolleges pathologie jaar 3

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Samenvatting Maag Darm Lever werkcolleges pathologie jaar 3

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Uploaded on
January 29, 2018
Number of pages
8
Written in
2016/2017
Type
Summary

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Werkcolleges 1 MDL
Pathologie
Bij het controleren van de tong, welke ziektes kun je dan
diagnosticeren?
Tekorten aan:
 B12
 IJzer
 Riboflavine
 Niacine
 Vitamine A

Functies van de spijsvertering
 Motiliteit
o In contact brengen van chymus met enzymen
o In contact brengen van chymus met de darmwand
o Voortstuwen van chymus richting de dikke darm
 secretie van enzymen
 absorptie van verteringsproducten




De darmwand heeft 3 spierlagen van gladde spieren, van binnen naar
buiten:
 slijmvlies (musculatuur)
 kringspierlaag (circulaire spier)
 lengte spierlaag (longitudinale spieren)

Anatomie van de dunne darm
Onderverdeling van de dunne darm in:
 Duodenum
 Jejunum
 Ileum
De dunne darm ontvangt chymus uit de maag
Het geeft overgebleven chymus door aan de dikke darm via valva ileocaecale
(klep)

, Gastrine (regulatie van maagsecretie)
 Wordt geproduceerd door de G-cellen in de maag en wordt gestimuleerd
door REK, peptiden en parasympaticus
 Inhibitie van HCl
 Gastrine verhoogt de contracties van de maag
 Gastrine verhoogt de secretie van HCl

Secretine (regulatie van pancreassecretie)
 Wordt geproduceerd door kliercellen in het duodenum en wordt
gestimuleerd door H+ionen
 Verlaagt de contracties van de maag
 Verlaagt de secretie van HCl
 Verhoogt de secretie van HCO3-
 Verhoogt de release van peptidase

Cholecystokinine (CCK)
 Wordt geproduceerd door kliercellen in het duodenum en wordt
gestimuleerd door vetzuren en aminozuren
 Verhoogt de release van enzymen in pancreas
 Verhoogt de contractie van de galblaas
 Verlaagt de contracties van de maag
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