P2 Maintenance of Cell Composition Flashcards
1
Q
Define facilitated diffusion.
A
Uses a carrier (membrane protein) to provide a pathway for a solute that is usually impermeable to cross the cell membrane
downhill; high –> low concentration
2
Q
What is the maximum flux based on?
A
Kinetics of the transporter
3
Q
What is the relationship between flux and concentration in a carrier-mediated system?
A
hyperbolic
4
Q
What is the relationship between flux and concentration in a simple diffusion?
A
linear
5
Q
What are the properties of carrier-mediated flux?
A
saturation
affinity
competition
