5 Questions
Give an example of a surface where gas exchange might occur.
The surface might be the air/water interface of a water body, the surface of a gas bubble in a liquid, a gas-permeable membrane, or a biological membrane that forms the boundary between an organism and its extracellular environment.
What is gas exchange?
Gas exchange is the physical process by which gases move passively by diffusion across a surface.
How do small unicellular organisms perform gas exchange?
In small unicellular organisms, the gas exchange membrane is typically the cell membrane due to their high surface-area to volume ratio.
What are some examples of specialised structures for gas exchange in larger organisms?
Specialised structures with convoluted surfaces such as gills, pulmonary alveoli, and spongy mesophylls provide the large area needed for effective gas exchange.
How do some small multicellular organisms perform sufficient gas exchange?
Some small multicellular organisms, such as flatworms, are able to perform sufficient gas exchange across the skin or cuticle that surrounds their bodies.
Test your knowledge of gas exchange in this quiz! Explore the process of passive diffusion of gases across different surfaces, such as air/water interfaces, gas bubbles, and biological membranes. Challenge yourself with questions about the consumption and production of gases by cellular processes.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
