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Metabolisme en voeding samenvatting: metabolisme

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Deze samenvatting is gebaseerd op de leerstof vanuit de e-learnings en mijn notities hierbij. LET OP! Ze bevat enkel het onderdeel metabolisme, het deel voeding heb ik via de video's op toledo gestudeerd. Met deze samenvatting behaalde ik voor dit vak een 16/20.

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Inhoudsopgave
Module 1: Biomoleculen................................................................................................. 5
Suikers/koolhydraten................................................................................................... 5
Lipiden/vetten............................................................................................................. 6
Proteïnen/eiwitten....................................................................................................... 7
Nucleïnezuren (RNA en DNA)....................................................................................... 7
Enzymen en katalyse.................................................................................................. 8
Polymorfismen............................................................................................................. 8
Module 2A: Wat is metabolisme?.................................................................................... 8
Katabolisme en anabolisme......................................................................................... 9
Drie globale doelstellingen van metabolisme: ATP, NADPH, bouwstoffen.................10
Hormonen regelen het lichaamsmetabolisme...........................................................11
Module 2B: Stofwisselingsziekten en metaboliet herstel..............................................12
Alkaptonurie, PKU, porfyrieën.................................................................................... 13
Dieet als behandeling................................................................................................ 14
Enzym-vervangende therapie....................................................................................15
Neonatale screening (de hielprik)..............................................................................16
Module 3A: Inleiding tot hormonen en neurotransmitters............................................16
Hormonen en neurotransmitters organiseren ‘homeostase’.....................................16
Werking van wateroplosbare en niet-wateroplosbare hormonen...............................17
Modulering en differentiëring van het hormonaal effect: aantal receptoren, subtypes
van receptoren en receptor desensitisatie................................................................18
Module 3B: Peptidehormonen en schildklierhormoon...................................................19
Processing van pre-pro-hormonen: insuline en RAAS................................................19
Productie en werking van schildklierhormoon...........................................................20
Afbraak van peptidehormoon.................................................................................... 21
Module 3C: Steroïdhormonen....................................................................................... 21
De bijnieren............................................................................................................... 21
Cortisol...................................................................................................................... 22
Retinoïnezuur............................................................................................................ 23
Vitamine D................................................................................................................. 24
Module 3D: Neurotransmitters en adrenaline...............................................................24
Synthese en afbraak van neurotransmitters.............................................................24
Catecholamines: synthese, afbraak, differentiëring van het effect...........................24
Serotonine, melatonine............................................................................................. 25
Glutamaat en GABA................................................................................................... 25
Acetylcholine............................................................................................................. 26
Stikstofmonoxide (NO).............................................................................................. 26

, Endocannabinoïden................................................................................................... 27
Module 3E: Lokaal werkende hormoonachtige stoffen..................................................28
Histamine, prostaglandines, leukotriënen.................................................................28
EPO, interleukines, colony stimulating factors, TNFa.................................................29
Module 3F: Hormonen-flux-voeding-ziektebeelden.......................................................30
Homeostase van de bloedsuikerspiegel (glycemie): insuline en glucagon................30
Hyperglycemie (diabetes) en hypoglycemie.............................................................32
Type 1-diabetes...................................................................................................... 32
Type 2-diabetes/ouderdomsdiabetes......................................................................32
Insulinoma/insulinoom........................................................................................... 32
Feochromocytoom..................................................................................................... 32
Syndroom van Cushing.............................................................................................. 33
Hypothyroïdie – hyperthyroïdie.................................................................................33
Module 4A: Energie....................................................................................................... 34
ATP/adenosine trifosfaat............................................................................................ 34
Glycolyse................................................................................................................... 35
Mitochondriale koolstofverbranding..........................................................................37
Anaplerose en kataplerose........................................................................................ 37
Bèta-oxidatie............................................................................................................. 37
Oxidatieve fosforylering............................................................................................ 37
Reactive oxygen species (ROS).................................................................................38
Module 4B: Hoe het menselijk lichaam energie uitgeeft...............................................38
3 grote posten van energie-uitgave..........................................................................39
ATP/adenosine trifosfaat............................................................................................ 39
Bruine vetcel (Brown Adipose Tissue: BAT)................................................................40
Module 5A: Metabole homeostase................................................................................40
Beheer van energievoorraden................................................................................... 40
De hypothalamus...................................................................................................... 41
Glucosehomeostase.................................................................................................. 41
Triglyceriden voorraadbeheer.................................................................................... 41
Module 5B: Glycogeenmetabolisme.............................................................................43
Lever vs spieren........................................................................................................ 43
Structuur van glycogeen........................................................................................... 43
Glycogenolyse vs glycogeen synthese......................................................................44
Module 5C: Gluconeogenese en ketogenese................................................................45
Gluconeogenese regulering (tandemenzym).............................................................45
Ketonlichamen – ketogenese..................................................................................... 46
Regulering van de ketogenese.................................................................................. 47
Ketogene dieet.......................................................................................................... 48

,Module 6A: Pentosefosfaatweg/hexosemonofosfaat shunt...........................................48
NADPH en bouwstenen.............................................................................................. 48
G6PD deficiëntie en favisme – malaria resistentie.....................................................49
Module 6B: Synthese van vetzuren en cholesterol.......................................................50
Vetzuursynthese – mega synthase............................................................................50
Triglyceriden/triacyl-glycerolen.................................................................................. 51
Mevalonaatweg = de novo cholesterolsynthese.......................................................51
Module 7: Lipidentransport en atherosclerose..............................................................52
Lipoproteïnen............................................................................................................ 52
Receptor-gemedieerde endocytose (RME) van LDL...................................................53
Atherosclerose/atheromatose.................................................................................... 54
Module 8A: Van vetzuren en cholesterol afgeleide moleculen......................................55
Glycerolipiden en sfingolipiden.................................................................................. 55
Lysosomale stapelingsziekten................................................................................... 55
Van cholesterol afgeleide moleculen.........................................................................56
Module 8B: Inleiding tot metabole detoxificatie...........................................................57
Detoxificatie van cholesterol..................................................................................... 57
Detoxificatie van lichaamsvreemde moleculen: CYP450 systeem, fase 1 en 2 reacties
.................................................................................................................................. 58
Polymorfismen van de CYP450 enzymen...................................................................59
Induceerbaarheid, cross-tolerantie, competitie.........................................................59
Fermentatie en detoxificatie van ethanol..................................................................60
Alcoholisch leverlijden/leversteatose.........................................................................60
Module 9A: Aminozuurmetabolisme............................................................................. 61
Essentiële vs niet-essentiële aminozuren..................................................................61
Stikstofbalans............................................................................................................ 62
Transaminasen/aminotransferasen............................................................................62
Eiwitkwaliteit (moedermelk is de norm)....................................................................63
Proteïne-energie malnutritie (PEM), marasmus en kwashiorkor................................63
Detoxificatie van ammoniak stikstofafval: de ureumcyclus.......................................64
Module 9B: Van aminozuren afgeleide moleculen........................................................65
Ergogene stoffen: creatine en carnitine.....................................................................65
Heemsynthese........................................................................................................... 65
Heemafbraak: bilirubine en icterus........................................................................... 66
Module 10A: Metabolisme van basen en nucleotiden...................................................67
Functies van nucleotiden........................................................................................... 67
Synthese en salvage pathway...................................................................................68
Nucleotide analogen in de geneeskunde...................................................................68
Module 10B: Metabole basis van jicht..........................................................................69

, Oorzaken van jicht..................................................................................................... 69
Metabole basis van jicht............................................................................................ 69
Preventie en behandeling van jicht........................................................................... 70
Module 12A: Oorzaken en gevolgen van diabetes........................................................71
Definitie van diabetes................................................................................................ 71
Type 1 en type 2 diabetes......................................................................................... 71
Het ziekteverloop in type 2 diabetes.........................................................................72
Genetische risicofactoren en complicaties van diabetes...........................................73
Module 12B: Oorzaken en gevolgen van obesitas........................................................74
BMI = body mass index............................................................................................. 74
Complicaties en epidemiologie.................................................................................. 75
Vetweefsel................................................................................................................. 76
Obesogene leefomgeving.......................................................................................... 77

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