Diffusion Flashcards
1
Q
What is diffusion
A
particles moving from a high concentration to a lower concentration until they are evenly spread
2
Q
How do particles get into a cell
A
particles pass through the cell membrane.
the membrane will only allow small molecules through.
oxygen and carbon dioxide can therefore pass through fine.
doesn’t use energy
molecules move spontaneously
3
Q
Factors that affect rate of diffusion
A
distance
concentration gradient
surface area
4
Q
distance
A
shorter distance, faster rate
5
Q
concentration gradient
A
molecules move from high to low concentration across a concentration gradient.
greater difference in concentrations, faster rate
6
Q
surface area
A
greater surface area, faster rate
