B1.6 DIFFUSION Flashcards
1
Q
what’s the definition of diffusion
A
spreading out of particles of ANY substance ( solution or gas )
2
Q
what does diffusion result in
A
results in a net movement from an area of higher concentration to a lower concentration down a concentration gradient
3
Q
what Is the rate of diffusion affected by
A
difference in concentrations, temperature, available surface area
4
Q
what’s the difference in concentration between 2 areas called
A
concentration gradient
5
Q
if there’s a large difference in concentrations what will happen
A
faster the rate of diffusion
6
Q
what determins net movement of particles across cell membrane
A
concentrations of the particles on either side of membrane
7
Q
examples of diffusion
A
- oxygen + glucose into cells from bloodstream for respiration
- carbon dioxide into actively photosynthesis plant cells
- oxygen + carbon dioxide in opposite directions in lungs ( gas exchange)
- simple sugars + amino acids from gut through cell membrane
