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Samenvatting Metabolisme | 2de Bach BMW | UA | 2026/27

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Dit studiemateriaal behandelt de cursus Metabolisme voor 2de Bachelor Biomedische Wetenschappen aan de Universiteit Antwerpen, samengesteld door Zeno De Paus. Het document omvat alle hoofdstukken zoals gezien in de les, met diepgaande uitleg van alle metabole processen en regelingsmechanismen. De noten bevatten gedetailleerde uitwerkingen van examenvragen, metabole ziekten, en energieopbrengsten uit glucose, waardoor het ideaal is voor examenvoorbereiding en het begrijpen van complexe biochemische routes.

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2de Bach. BMW Metabolisme
Door Zeno De Paus

,Zeno De Paus Metabolisme 2de Bach. BMW
Inhoud
Hoofdstuk 1: Glycolyse en gluconeogenese....................................................................................................... 4
Inleiding ............................................................................................................................................................................4
Opname van glucose in de cel via transporters ................................................................................................5
Passieve opname van glucose..............................................................................................................................5
Actieve opname van glucose ................................................................................................................................6
De glycolyse .....................................................................................................................................................................6
Dissachariden als bron van koolhydraten ................................................................................................... 11
Metabole ziekte rondom de glycolyse ........................................................................................................... 12
Regulatie van de glycolytische weg ................................................................................................................ 13
De gluconeogenese .................................................................................................................................................... 14
Regulatie van de gluconeogenese ................................................................................................................... 17
Oplossing examenvraag ........................................................................................................................................... 20
Hoofdstuk 2: De citroenzuurcyclus .................................................................................................................... 21
Inleiding ......................................................................................................................................................................... 21
De omzetting van pyruvaat naar acetyl-CoA ................................................................................................... 21
De reacties van de citroenzuur cyclus ............................................................................................................... 22
Regulatie van de citroenzuur cyclus ................................................................................................................... 24
Het amfibool karakter van de citroenzuurcyclus .......................................................................................... 25
Metabole aandoeningen .......................................................................................................................................... 26
Oplossing examenvraag ........................................................................................................................................... 26
Hoofdstuk 3: De oxidatieve fosforylatie ........................................................................................................... 27
Inleiding ......................................................................................................................................................................... 27
Vrije energie opbrengst van elektronentransport ........................................................................................ 27
De elektronentransportketen................................................................................................................................ 29
De protonengradiënt drijft de synthese van ATP .......................................................................................... 31
Transport doorheen mitochondriale membranen ....................................................................................... 33
Totale ATP opbrengst uit glucose ........................................................................................................................ 33
De regulatie van de cellulaire respiratie ........................................................................................................... 34
Oplossing examenvraag ........................................................................................................................................... 35




1

,Zeno De Paus Metabolisme 2de Bach. BMW
Hoofdstuk 4: Pentosefosfaat weg ....................................................................................................................... 35
Inleiding ......................................................................................................................................................................... 35
Reacties van de pentosefosfaat weg ................................................................................................................... 36
Het lot van glucose-6-fosfaat (G6P) .................................................................................................................... 37
De rol van de pentosefosfaat pathway in de bescherming tegen oxidatieve stress ........................ 39
Oplossing examenvraag ........................................................................................................................................... 39
Hoofdstuk 5: Het glycogeen metabolisme ....................................................................................................... 40
Inleiding ......................................................................................................................................................................... 40
De afbraak van glycogeen........................................................................................................................................ 41
Regulatie van de glycogeen afbraak .................................................................................................................... 42
De synthese van glycogeen ..................................................................................................................................... 43
Regulatie en reciproke regulatie van de glycogeen synthese ................................................................... 44
Regulatie van de glycogeen synthese ............................................................................................................ 44
Reciproke regulatie van de glycogeen afbraak en synthese ................................................................. 45
Metabole aandoeningen .......................................................................................................................................... 46
Oplossing examenvraag ........................................................................................................................................... 46
Hoofdstuk 6: De globine familie .......................................................................................................................... 47
Inleiding ......................................................................................................................................................................... 47
Hemoglobine en myoglobine ................................................................................................................................. 47
De myoglobine-𝑂2 binding ................................................................................................................................ 48
De hemoglobine-𝑂2 binding ............................................................................................................................. 49
Allosterische effectoren van hemoglobine....................................................................................................... 51
Ziekten veroorzaakt door mutaties in hemoglobine ................................................................................... 52
Oplossing examenvraag ........................................................................................................................................... 53
Hoofdstuk 7: Vetten ................................................................................................................................................ 54
Herhaling ....................................................................................................................................................................... 54
Triglyceriden zijn hoog geconcentreerde energiebronnen ....................................................................... 55
Transport van vetten in ons lichaam .................................................................................................................. 55
Vetzuurafbraak (= katabolisme) ......................................................................................................................... 59
Vetzuursynthese (= anabolisme) ........................................................................................................................ 62
Regulatie van het vetzuurmetabolisme............................................................................................................. 63
De synthese van cholesterol en zijn derivaten ............................................................................................... 64
Eicosanoïde hormonen ............................................................................................................................................ 65
Fosfolipiden .................................................................................................................................................................. 66




2

, Zeno De Paus Metabolisme 2de Bach. BMW
Hoofdstuk 8: Eiwitten en aminozuren .............................................................................................................. 67
Extracellulaire afbraak van eiwitten tot aminozuren .................................................................................. 67
Intracellulaire afbraak van eiwitten tot aminozuren................................................................................... 68
Aminozuur afbraak: verwijdering van N-atoom............................................................................................ 69
Uitscheiding van 𝑁𝐻4 + via de ureumcyclus............................................................................................. 71
Aminozuur afbraak: katabolisme van het koolstof skelet ......................................................................... 72
Afwijkingen in het aminozuur katabolisme .................................................................................................... 73
Afgeleiden van tyrosine: catecholamines ......................................................................................................... 74
Aminozuren als bron voor de ‘one-C-pool’ ...................................................................................................... 75
𝑁2-fixatie ....................................................................................................................................................................... 76
Aminozuur anabolisme ............................................................................................................................................ 77
Regulatie aminozuur synthese.............................................................................................................................. 79
Aminozuren als precursoren van vele biomoleculen .................................................................................. 79
Hoofdstuk 9: Nucleotiden ..................................................................................................................................... 80
Herhaling ....................................................................................................................................................................... 80
De purine nucleotide synthese (volledig te kunnen tekenen) ................................................................. 81
De novo purine nucleotide synthese ............................................................................................................. 81
Salvage pathway ..................................................................................................................................................... 83
De pyrimidine nucleotide synthese (volledig te kunnen tekenen)........................................................ 84
De novo pyrimidine nucleotide synthese .................................................................................................... 84
Salvage pathway van pyrimidine nucleotide synthese .......................................................................... 85
Deoxyribonucleotiden synthese........................................................................................................................... 85
Hoofdstuk 10: Geïntegreerd metabolisme ...................................................................................................... 86
Orgaan specificiteit .................................................................................................................................................... 86
Metabole homeostase en adaptatie .................................................................................................................... 89




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