Cells Diffusion Flashcards
Define diffusion
The net movement or spreading of particles from an area of high concentration to an area of lower concentration
Define net movement
net movement = particles moving in - particles moving out
What is the concentration gradient?
The difference between two areas of concentration
The bigger the difference in concentrations between two areas, …
the steeper the concentration gradient
How and why does temperature affect the rate of diffusion?
Temperature makes particles move more quickly
Why might a cell have a large surface area?
Allows diffusion to take place more quickly
How might a cell increase its surface area?
Folding up membranes or tissue linings
What substances pass through cell membranes in an animal body?
Water, simple sugars, amino acids from protein breakdown, oxygen (into red blood cells)
