Gas Exchange In Single Celled Organisms Flashcards
1
Q
What is the importance of single-celled organisms being small?
A
They have a large surface area to volume ratio.
2
Q
How is oxygen absorbed in single-celled organisms?
A
Oxygen is absorbed by diffusion across their body surface, which is only covered by a cell-surface membrane.
3
Q
How does carbon dioxide leave the organism?
A
Carbon dioxide from respiration diffuses out across their body surface.
