11 MZB I - Devuyst
Mecanisms of Membrane Transport
Mecanisms of Membrane Transport
Set of flashcards Details
| Flashcards | 41 |
|---|---|
| Students | 13 |
| Language | Deutsch |
| Category | Medical |
| Level | University |
| Created / Updated | 30.03.2016 / 09.03.2021 |
| Licencing | Not defined |
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Ralle von Biologischen Membranen
- Protection, solation
- Compartimentalization
- Communication, interface with external environment
- Gates, water & solutes transport
Types of Diffusion
s.B.
Fick First Law
s.B.
Pores
Non-gated channels = channels that are always open
Gap junction
Teil einer Synapse
Connexon
Aufbau
Funktion
Six connexins assemble to form a connexon
Connexons in the plasma membrane of the cell lign with the connexons of an adjacent cell, forming a hydrophilic channel between two cytoplasms.
-> two connexons form a channel
connexons provide:
• Size selectivity
• Open-closed conformation
The Overton Rule
• The boundary of cells is mostly constituted of a lipidic material
• Non-lipophilic substances (incl. water) must use specific pathways
CHIP 28 - Aquaporin 1
Channel-like Integral Membrane Protein
-> Extremely abundant in RBCs (redbloodcells)
-> billions of water moleclues can cross the pore per second
