diffusion Flashcards
1
Q
what is diffusion
A
is the spreading out of particles from an area of high concentration to an area of low concentration
2
Q
where does diffusion usually happen
A
happens in both solutions and gases - that is because the particles in these substances are free to move about randomly
3
Q
what happens if the temperature is high
A
give a faster diffusion rate because the particles have more energy, so move around faster
4
Q
what kind of molecules can diffuse through cell membranes
A
small molecules such as water, glucose and oxygen
however big molecules such as starch and protein cannot fit through the membrane
5
Q
what happens if the surface area of the membrane is high
A
the higher the surface area the faster the diffusion rate, because more particles can pass through at once
