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Samenvatting stofwisseling en energetica
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een samenvatting van stofwisseling en energetica
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HOOFDSTUK 17: STOFWISSELING EN ENERGETICAKEYPOINTS VAN DIT HOOFDSTUK
- Adenosinetrifosfaat. (ATP)
Geef de chemische reactie van de afbraak/aanmaak van ATP.
ATP -> ADP + P + E
- Voor welke processen gebruikt de cel de energie die vrijkomt uit de afbraak
van ATP?
Spiercontracties, beweging, transport binnen de cel, cytokinese,
endocytose, exocytose
ATP zorgt ook voor groei en onderhoud/ herstel
- Energie toevoegen bij de aanmaak van ATP
De afbraak van glucose
Welke drie chemische processen kent de afbraak van
glucose?
1. Glycolyse: C6H12O6
o IN: glucose
o OUT: pyrodruivenzuur
o Winst: energie voor 2x ATP
Gebeurt in: cytosol
Geen zuurstof nodig -> anaëroob proces
2. Pyrodruivenzuurcyclus = citroenzuurcyclus = Krebcyclus
IN: pyrodruivenzuur + O2 (we voegen zuurstof toe om CO2 + H+
evenwichtig te maken)
OUT: CO2 + H+
Winst: energie voor 2x ATP
Gebeurt in: de mitochondriën
Zuurstof nodig -> aëroob proces
3. Elektronentransportsysteem
IN: H+ + O2
OUT: H2O
Winst: energie voor 32x ATP
Gebeurt in: de mitochondriën
Zuurstof nodig -> aëroob proces
1 molecule glucose 36x ATP (moet wel in juiste
volgorde gebeuren)
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