2.1.2 Dissolved substances Flashcards
1
Q
How do dissolved substances move in and out of cells?
A
Dissolved substances can move into and out of
cells by diffusion.
2
Q
What is diffusion?
A
Diffusion is the spreading of the particles of a gas,
or of any substance in solution, resulting in a net
movement from a region where they are of a
higher concentration to a region with a lower
concentration
3
Q
How can you increase the rate of diffusion?
A
The greater the difference in
concentration, the faster the rate of diffusion.
4
Q
Give an example of diffusion in the human body?
A
Oxygen required for respiration passes
through cell membranes by diffusion.
