A - 2 - Gas Exchange Flashcards
1
Q
What is a gas exchange surface?
A
A boundary between the outside environment and the internal environment of and organism over which gas exchange occurs
2
Q
What are the two factors gas exchange surfaces often have the affect the rate of diffusion?
A
- Large surface area
- They are thin, providing a shorter diffusion pathway
3
Q
How does diffusion occur in single celled organisms?
A
Diffusion takes place through their cell surface membranes.
