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Samenvatting HS2 cellen fysiologie 2021

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Uploaded on
March 26, 2021
Number of pages
7
Written in
2020/2021
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Hoofdstuk 2: Cellen



Hoofdstuk 2. Cellen
STUDIE VAN DE CEL

1. Bouw

Microvillus



Celkern
Ribosoom
Kernlichaampje

Cytoplasma



Mitochondriën


Celmembraan


 Elk levend organisme
‐ Eén cel
‐ Meer cellen
 Elke cel  zelfde bouwplein
‐ Plasmamembraan
‐ Cytoplasma
‐ Celorganellen
o Kern of nucleus
o …

1.1 plasmamembraan
 Water H2O zowel binnen als buiten de cel
‐  barrières nodig
‐ = plasmamembraan
o Geen wateroplosbare moleculen  fosfolipiden

,  Fosfolipidenlaag




 Eiwitten
‐ Hydrofobe middelste deel  verhinderen doorgaan water en wateroplosbare
moleculen
‐ Transportgangen nodig
‐ Transporteiwitten

1.2 Het cytoplasma
 Vloeibare inhoud buiten de kern
 Samenstelling
‐ H2O
‐ 20% eiwit
‐ 1% klein moleculaire stoffen

1.3 de celorganellen
 Organellen
‐ Permanent
‐ Door de cel gevormd
‐ Specifieke functie
 Insluitsels
‐ Tijdelijk
‐ Door de cel gevormd of door cel opgenomen
‐ Opstapelingsplaats van materiaal
 Kern
‐ Vorm
o Rond, ovaal, eivormig
‐ Bevat genetisch materiaal
‐ Functie:
o Functies van de cel bepalen
o Basis voor eiwit productie
 Mitochondriën
‐ Bol of staafvormige structuren
‐ Elke cel > 100
‐ Energiecentrales
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