Diffusion Flashcards
1
Q
What is diffusion
A
the gradual movement of particles from places where there are lots of them to places where there are fewer than them - higher concentration to lower concentration
2
Q
Diffusion happens in both…
A
solutions and gases
3
Q
Why are cell membranes clever
A
hold the cell together whilst letting things in and out
4
Q
How can dissolved substances move in and out of cells
A
diffusion
5
Q
What size molecules can diffuse through a cell wall - give examples
A
small - glucose, water and amino acids
