Summary
samenvatting microcirculatie
- Course
- Institution
samenvatting van microcirculatie
[Show more]
Seller
Follow
mh14
Content preview
SAMENVATTING MICROCIRCULATIE 4 functies
1) Artriolair (weerstandvaten)
2) Veneus (capacitatie) => distributie bloedvolume
3) Passage & interactie leukocyten (inflamatie)
4) Uitwisseling
Door contractie van precapillairen sphinters kan bloed enkel door de hoofdbloedvat stromen naar
het hart (flow stopt van capilairen)
Rust: slecht 1 arteriolen gedilateerd voor O2 aanvoer naar de skeletspieren
Niet alle capillairen zijn in rust open
Inspanning: andere arterialen dilateren -> meer perfusie van de skeletspieren
! bloedcellen (rbc, wbc) moeten hervormen om door capillairen te passen (kleine diameter)
4 processen van transport door capillaire wand
1) Diffusie : 02,CO2, goed lipofiele moleculen -> door epitheelcel heen
2) Bulk flow: H20, elektrolyten & kleine moleculen -> door cel-cel adhesie
- weinig bij continu capillair
3) Pinocytose: macro-moleculen -> endo/exocytose van vloeistof
4) Actief transport: ionen, kleine moleculen -> via ATP pompen
Continu capillair: dichte hechtingen tussen endotheelcellen -> weinig bulkflow
Capillair met fenestraties: veel fenestraties of porien in endotheelcellen
- Bv: nier, darmmucose
Sinusoid: discontinu capillairen: hoge permeabiliteit door incompleet basaal membraan &
intercellulaire openingen
- Bv: Lever, beenmerg
WET VAN FICK: J = A x D x (delta C)/X => J = P x A x delta C
flux in mol/sec = diffusieconstante x oppervlakte x concentratieverschil/ afstandverschil
permeabiliteitsconstante: P = delta D/delta X
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mh14. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.83. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80364 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now