Diffusion Flashcards
1
Q
Diffusion is a passive process because …
A
It only depends on the KE of particles and doesn’t require ATP
2
Q
Diffusion definition
A
Movement of particles from an area of high concentration to an area of low concentration
3
Q
Simple diffusion
A
Diffuse through membrane without help of another molecule
E.g. Small, fat soluble molecules (steroids, CO2, O2, lipids)
4
Q
Facilitated diffusion
A
Uses protein channels or carriers
Channel = any charged particle (Na+, Ca2+) or water (which uses aquaporins)
Carrier = large molecules (amino acids, glucose)
5
Q
Equilibrium
A
When there is an even distribution of particles
6
Q
Net movement
A
Overall movement of particles in one direction until equilibrium is reached
7
Q
Things that affect diffusion
A
Temperature Size of molecule Surface area Diffusion distance Concentration gradient
