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Samenvatting H9: olfactief systeem

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9: OLFACTIEF SYSTEEM

9.1 INLEIDING


Functies reuk
 Werkt samen met smaak  voedselbronnen identificeren
 Veel geuren onderscheiden
Ø Zeker potentieel schadelijke
 Communicatie
 Dieren: feromonen rol bij reproductie


Reukepitheel mens <<< honden



9.2 HET REUKORGAAN


Reukepitheel hoog in neusholte
 Receptorcellen + steuncellen + basale cellen
 Bedekt met dunne laag mucus
Ø Waar reukstoffen in oplossen voor ze binden aan R
 Receptorcellen
Ø Neuronen die voortdurend vernieuwd door regeneratie vu basale cellen
Ø Hebben dunne dendriet die in knop eindigt aan epitheeloppervlak
 V daaruit steken meerdere cilia, die R bevatten, in mucuslaag
Ø Aan andere uiteinde: ongemyeliniseerde axonen die in bundels (= fila olfactoria)
schedel binnendringen
 Lopen uiteindelijk uit in bulbus olfactorius




1

, Figuur 9.1. Projecties van de olfactieve receptorcel naar de glomeruli in de bulbus olfactorius.




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