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Fysiologie Van De Orgaanstelsels - COMPLETE SAMENVATTING

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Dit zijn studienotities voor Fysiologie van de orgaanstelsels uit het 2de bachelor Biomedische Wetenschappen aan de Universiteit Antwerpen. De notities behandelen kernthema's zoals het autonoom zenuwstelsel, hematologie, bloedcirculatie, elektrofysiologie, ECG en hartfysiologie, inclusief hemodynamica, capillaire uitwisseling en hartritmestoornissen. Dit is een uitstekende voorbereiding op het examen met goed gestructureerde uitleg van alle grote onderwerpen uit het vak.

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2de Bach. BMW Fysiologie van de
orgaanstelsels
Door Zeno De Paus

,Zeno De Paus Fysiologie van de orgaanstelsels 2de Bach. BMW
Inhoud
Herhaling autonoom zenuwstelsel (AZS) ...............................................................................................................................4
Hematologie ......................................................................................................................................................................................5
Bloed en bloedcomponenten ..........................................................................................................................................................5
Rode bloedcellen (RBC) - erythrocyten ...............................................................................................................................6
Stolling en ontstolling ..................................................................................................................................................................9
Circulatie ......................................................................................................................................................................................... 10
Functionele anatomie ..................................................................................................................................................................... 10
Hemodynamica .................................................................................................................................................................................. 11
Capillaire uitwisseling .................................................................................................................................................................... 13
Elektrofysiologie en ECG ........................................................................................................................................................... 16
Elektrofysiologie ............................................................................................................................................................................... 16
Actiepotentiaal en conductie ................................................................................................................................................. 17
Modulatie van het hartritme .................................................................................................................................................. 20
Electrocardiogram (ECG) .............................................................................................................................................................. 21
Nomenclatuur ............................................................................................................................................................................... 21
Ontstaan van het ECG ................................................................................................................................................................ 22
Het normale ECG ......................................................................................................................................................................... 23
Hartritmestoornissen ................................................................................................................................................................ 24
Het hart als pomp ........................................................................................................................................................................ 25
Van contractiele elementen naar regulatie van pompwerking .................................................................................... 25
De hartcyclus ...................................................................................................................................................................................... 28
Duur van de hartcyclus ............................................................................................................................................................. 28
De 4 hartfasen ............................................................................................................................................................................... 29
Pulsatiele flow en drukgolf in grote bloedvaten ............................................................................................................ 29
Veneuze drukgolven ................................................................................................................................................................... 31
Dynamica.............................................................................................................................................................................................. 31
Morfologie van de ventrikels.................................................................................................................................................. 31
Hartcyclus rechterhart – linkerhart: gelijkenissen en verschillen ........................................................................ 32
De pompwerking van het hart ............................................................................................................................................... 32
Druk-volume curves ................................................................................................................................................................... 33
Arbeid van het hart ..................................................................................................................................................................... 33
Regulatie van de pompwerking ............................................................................................................................................ 34




1

,Zeno De Paus Fysiologie van de orgaanstelsels 2de Bach. BMW
Regeling bloeddruk en hartdebiet.......................................................................................................................................... 35
Vitale parameters ............................................................................................................................................................................. 35
Regeling van de bloeddruk ........................................................................................................................................................... 36
Intrinsieke mechanismen ............................................................................................................................................................. 38
Extrinsieke mechanismen ............................................................................................................................................................ 39
Matching van veneuze retour en hartdebiet......................................................................................................................... 40
Vascular Function Curve en Cardiac Function Curve .................................................................................................. 40
Middellange tot lange termijn controle .................................................................................................................................. 41
Integratie van alle mechanismen............................................................................................................................................... 42
Pneumologie: Functionele anatomie en spirometrie ....................................................................................................... 43
Algemene aspecten .......................................................................................................................................................................... 43
De luchtwegen ................................................................................................................................................................................... 44
De alveolen .......................................................................................................................................................................................... 46
Longvolumes en longcapaciteit, respirometrie ................................................................................................................... 47
Mechanica van longventilatie ...................................................................................................................................................... 48
De longcirculatie ............................................................................................................................................................................... 49
Ventilatie en perfusie verhouding ............................................................................................................................................. 49
De bezenuwing van de long ......................................................................................................................................................... 50
De gasuitwisseling ........................................................................................................................................................................... 50
De fysische eigenschappen van gas ..................................................................................................................................... 50
Partiële drukken in longalveole ............................................................................................................................................ 51
De gasuitwisseling met het bloed ........................................................................................................................................ 51
𝑂2 transport in het bloed .............................................................................................................................................................. 52
Inleiding .......................................................................................................................................................................................... 52
𝑂2 binding aan hemoglobine ................................................................................................................................................. 53
𝐶𝑂2 transport in het bloed ........................................................................................................................................................... 54
De regulatie van de ademhaling ................................................................................................................................................. 54
Het ademhalingscentrum en betrokken sensoren ....................................................................................................... 55




2

, Zeno De Paus Fysiologie van de orgaanstelsels 2de Bach. BMW
Nier ................................................................................................................................................................................................... 56
Algemeenheden, anatomie en histologie ............................................................................................................................... 56
De glomerulaire filtratie (GFR) .................................................................................................................................................. 57
Renale bloedflow (RBF) ................................................................................................................................................................ 59
Transport van ionen ........................................................................................................................................................................ 60
Inleiding tubulaire functies .................................................................................................................................................... 60
Proximale tubulus ....................................................................................................................................................................... 61
De lus van Henle .......................................................................................................................................................................... 62
Distale tubulus .............................................................................................................................................................................. 63
Verzamelbuizen (= collecting ducts) ................................................................................................................................. 64
Urine concentratie en verdunning ............................................................................................................................................ 65
De nier en het behoud van homeostase.................................................................................................................................. 66
Regulatie van het extracellulair vocht (ECF) .................................................................................................................. 66
Pathologische vochtregulatie ................................................................................................................................................. 67
Regulatie van de 𝐾 +-balans .................................................................................................................................................. 68
Zuur-base evenwicht .................................................................................................................................................................. 69
Inleiding en terminologie.............................................................................................................................................................. 69
Bronnen van zuur ............................................................................................................................................................................. 69
De vorming van 𝐻 +-ionen........................................................................................................................................................... 70
Buffers ................................................................................................................................................................................................... 71
Verstoring van de zuur-base balans ......................................................................................................................................... 72
Mechanisme van de renale 𝐻𝐶𝑂3 −-reabsorptie en productie ................................................................................... 73
Gastro-intestinaal stelsel (GI-stelsel).................................................................................................................................... 74
Motiliteit en regulatie ..................................................................................................................................................................... 74
Digestie en absorptie ...................................................................................................................................................................... 77
Endocrinologie.............................................................................................................................................................................. 79
Inleiding ................................................................................................................................................................................................ 79
Synthese................................................................................................................................................................................................ 80
Kinetiek ................................................................................................................................................................................................. 81
Hypothalamus en hypofyse .......................................................................................................................................................... 82
De schildklier en de bijschildklier ............................................................................................................................................. 83
De bijnier .............................................................................................................................................................................................. 84
De pancreas ......................................................................................................................................................................................... 85
Visuele weergave .............................................................................................................................................................................. 86
Hypothalamus-hypofyse-as .................................................................................................................................................... 86
De schildklier (1) en bijschildklieren (4) ......................................................................................................................... 86
De bijnier ........................................................................................................................................................................................ 87
Fysiologie van de veroudering ................................................................................................................................................ 88



3

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