Facilitated Diffusion Flashcards
1
Q
What is facilitated diffusion?
A
The rate of diffusion of substances across a membrane increased as its concentration gradient increases
2
Q
What’s its relationship with maximum rate?
A
Curved
3
Q
What does it involve?
A
Channel and carrier proteins
4
Q
Channel protein
A
Hydrophilic channel allows solute through
5
Q
Carrier proteins
A
Opens/ forms a gate allowing solute to pass through
6
Q
What happens if a protein is not present?
A
It cannot move
7
Q
Can you change the rate of diffusion?
A
No as it happens “one at a time”
8
Q
Can the carrier proteins only transport a solute in only one way?
A
No both ways depending on the concentration gradient
9
Q
3 bullet points
A
Carrier proteins and protein channels
NO ATP
Down a concentration gradient
