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samenvatting Genie Biologie 5.2 - thema 2, hoofdstuk 3
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thema 2, hoofdstuk 3: celademhaling volgt de structuur van het boek gebruik van afbeeldingen en schema's
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CELADEMHALING1. CELADEMHALING EN FERMENTATIES
Ademhaling:
o Opnemen O2, afgeven CO2
o =gaswisseling, uitwendig aspect
O2 -> cellen -> oxidatie van voedingstoffen, met productie van ATP
o =celademhaling, inwendige ademhaling, aerobe energieproductie,
aerobe dissimilatie
Oxidatie in
cellen
voedingssto
Poly- en ffen
Monosachariden 55 – 63%
disachariden Glycerol en vetzuren 35-25%
Lipiden aminozuren 10-12%
proteïnen
%
totale
voedselbesta
nddelen
Spijsvertering in
spijsverteringska
Glycolyse: glucose -> 2 moleculen pyrodruivenzuur
Met O2 =aerobe celademhaling
o CO2
o Citroenzuurcyclus / krebscyclus
o Elektronentransportketen (= oxidatieve fosforylering)
Zonder O2 = anaerobe celademhaling
o = fermentatie of gisting
Het verloop van de oxidatie van glucose
3 fasen
o 1 Glycolyse
o 2 Citroenzuurcyclus of krebcyclus
o 3 eindoxidatie
2 Glycolyse
, glucose
2 ATP
2 (ADP + P)
C3 C3 NAD+
NAD+
NADH +
NADH +
H+
H+
2 (ADP +
P) 2 (ADP + P)
2 ATP 2 ATP
Pyruvaat (C3)
Pyruvaat (C3)
C6H12O6 + 2(ADP + P) + 2NAD+
2 pyruvaat + 2 ATP + 2(NADH + H+)
3. DECARBOXYLERING VAN PYRODRUIVENZUUR
Pyrodruivenzuur naar matrix mitochondrion
Decarboxyleren = CO2 afsplitsen
C3 -CO2 = C2
C2 + co-enzym A = acetyl-CoA
Ontstaan van NADH
4. KREPLERCYCLUS
Pyruvaat (C3)
NAD+
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