Diffusion Flashcards
1
Q
What is diffusion?
A
Net movement of particles down concentration gradient
2
Q
What is facilitated diffusion?
A
Diffusion across protein channel on plasma membrane
(has selective permeability)
3
Q
What are the factors increasing the rate of diffusion?
A
- Temperature
- Concentration difference
- Surface area to volume ratio
- Thickness of membrane (diffusion distance)
4
Q
What does an increase in temperature do?
A
Increasing temp increases kinetic energy. Particles vibrate more quicker
5
Q
What does an increase in concentration difference do?
A
The steeper the concentration gradient, the quicker the concentration difference
6
Q
What does an increase in surface area to volume ratio do?
A
Larger ratio the quicker the diffusion rate
7
Q
What does the increase thickness of membrane do?
A
Thinner the membrane, shorter the distance, quicker diffusion rate
