Diffusion Flashcards
What is DIFFUSION?
The spreading out of particles from an area of high concentration to an area of low concentration.
Diffusion happens in both…
Gases and solutions.
The bigger the difference in concentration…
The faster the diffusion rate.
Dissolved substances can move in and out of…
Cells by diffusion.
Name 4 small molecules that can diffuse through a cell membrane
Oxygen.
Glucose.
Amino acids.
Water.
Name 2 molecules that can’t fir through the membrane?
Starch.
Proteins.
Particles flow through what?
The cell membrane.
Why does diffusion happen in gases and solutions?
Because the particles in these substances are free to move about randomly.
Name a simple type of diffusion?
When different gases diffuse through each other.
This is what happens when the smell of perfume diffuses through the air in a room.
How are cell membranes clever?
Because they hold the cell together but they let stuff in and out.
