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Samenvatting Geneeskunde tentamen 1.2.2 Hoofdstuk farmacologie

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Een hoofdstuk samengevat van de toets geneeskunde 1.2.2

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Uploaded on
June 20, 2024
Number of pages
3
Written in
2023/2024
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Summary

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Farmacologie
Beschrijft fysieke interactie van medicijn met receptoren.
Distributie = absorptie van medicijn
Aangrijpingspunt = lichaamseigen eiwit
- Receptoren
- G-eitwit gebonden rec (sec messenger, cascade van rea)
- Dna gebonden rec (activ deel DNA → fysiologisch respons)
- Enzym gebonden rec
- Ion rec (regulerend effect op ap en concentratiegradiënt)
- Ionkanalen
- Enzymen
- Transporteiwitten


Natuurlijke boodschapper Bijbehorende rec groep

(Nor)Adrenaline Adrenerg

Acetylcholine Cholinerg

Histamine Histamine

Opioïde achtige peptide Opioïde


Geen farmacon aanwezig: rec inactief = R
Chemische boodschapper bindt aan rec: evenwicht verschuift naar R*
Constitutief actieve rec: spontaan actieve rec

Farmacon werkt op verschillende manier aan op rec:
- Agonist: verschuiven evenwicht van R → R* (activeren rec)
- Inverse agonist: “ (het tegenovergestelde)
- Antagonist: geen effect op evenwicht, blokkeren wel stoffen die het beïnvloeden.
- Partiële agonist:
- Competeert met volle agonist → werkt als partiële agonist
- Competeert met antagonist → werkt als agonist

CWC = conc werkingscurve
- Emax = max respons bij volledige rec bezetting
- Affiniteit = wederzijdse aantrekking tussen rec en farmacon
- EC50 = conc farmacon nodig om helft van max respons
- pD2 = sterkte van werking van farmacon aangeven
- Bij lagere affiniteit schuift curve naar r

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