Kleine verschillen in concentratie
van lading => potentiaalverschillen
Membraanpotentiaal= binnenzijde
is negatiever dan buitenzijde
2
, b. Uitwisseling
Uitwisseling tussen de verschillende compartimenten:
- Water
- Ionen
- Moleculen met signalisatie/metabole functies
Samenstelling van de compartimenten CONSTANT
Homeostase = constant houden van een lichaamstoestand door regelsystemen
Allostase= constant houden van een lichaamstoestand door verandering
! Minste vocht in beenderen
! Meeste vocht in hersenen
! Kinderen hebben grotere waterinhoud, ze verliezen meer door grotere
oppervlakte/volume verhouding
Hoofdstuk 2: overzicht transporten
Membranen selectief doorlaatbaar
Transport over membranen
3
, 2.1 Passief transport
- Spontaan
- Geen energie
- Met concentratiegradiënt mee
2.2 Actief transport
- Niet spontaan
- Energie nodig
- Tegen de concentratiegradiënt in
Primair actief transport Energie uit ATP Na/k pomp verbruikt ATP
om concentratie K binnen
hoog te houden
Secundair actief transport Energie uit spontaan
transport
4
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 ElisabethGeneeskunde. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.30. You're not tied to anything after your purchase.