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samenvatting nieren homeostase

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  • December 1, 2024
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  • 2023/2024
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4. HOMEOSTATISCHE FUNCTIE VAN DE
NIEREN
4.1. MACROSCOPISCHE BOUW VAN DE NIER

4.1.1. FUNCTIE VAN DE NIER

Functie nier:

 Verwijderen van afvalstoffen
o Van bloed voorzien via nierslagader (zijtak aorta)
o Nieren zuiveren het bloed
o Nierader transporteert gezuiverd bloed naar uitmonding holle ader
o Nierslagader / nierader grotere doorsnede (veel bloed transport)
 Regelen van vochtbalans
o Urine in de nieren gevormd
o Urineleiders -> blaas
o Spieren blaas trekken samen als je moet plassen
 Regeling zuurtegraad, zoutconcentratie en aantal eiwitten in bloed
 Productie hormonen (door bijnieren)
o EPO: aanmaak rode boedcellen
o EW renine: regeling bloeddruk

4.1.2. MACROSCOPISCHE BOUW VAN DE NIER

Situering:

 2 nieren aan de achterkant lichaam
 Weerszijden van wervelkolom
 Bovenste deel onder de ribben (redelijke bescherming
 10-15 cm
 160 gr

Macroscopische bouw:

 Nierkapsel: gladde laag stevig bindweefsel
o Nierschors
o Niermerg: gegroepeerd in
nierpiramiden (kegelvormige
structuren)
 Nierbekken (nierschors en niermerg rond):
urine door peristaltische bewegingen door de
urineleider naar de blaas.

, 4.2. MICROSCOPISCHE BOUW VAN DE NIER




nierader




Het kapsel van Bouwman:

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