Diffusion Flashcards
1
Q
Diffusion
A
the net (overall) movement of particles from an area of higher concentration to an area of lower concentration
2
Q
Does diffusion require energy?
A
no because its a passive process
3
Q
Where does diffusion happen?
A
in liquids and gases because the particles in these substances are free to move randomly
4
Q
The bigger the difference in concentration the faster the what?
A
the diffusion rate
5
Q
What does diffusion, osmosis and active transport all have in common?
A
they enable substances to move in and out of cells
6
Q
What can diffuse through cell membranes?
A
Only very small molecules like glucose, amino acids, water and oxygen
7
Q
What can’t diffuse through cell membranes?
A
Big molecules like starch and proteins can’t fit through the membrane
