10 Questions
What is the primary process by which gases move across a surface?
Diffusion
Which structure provides the large surface area needed for effective gas exchange in most larger organisms?
Pulmonary alveoli
What is the gas exchange membrane typically for small, particularly unicellular organisms?
Cell membrane
Which organisms are able to perform sufficient gas exchange across the skin or cuticle that surrounds their bodies?
Flatworms
Why do larger organisms require specialised structures for gas exchange?
To increase surface area
What is the primary process by which gases move across a surface during gas exchange?
Diffusion
Which structure typically serves as the gas exchange membrane for small, particularly unicellular organisms?
Cell membrane
In most larger organisms, what provides the large surface area needed for effective gas exchange?
Gills
What is the gas exchange surface for some small multicellular organisms, such as flatworms?
Skin or cuticle
Why do small, particularly unicellular organisms have a high surface-area to volume ratio?
To facilitate efficient gas exchange
Test your knowledge of gas exchange with this quiz! Explore the process of passive diffusion of gases across various surfaces, such as air/water interfaces, gas bubbles, and biological membranes. Challenge yourself with questions on the consumption and production of gases by cellular processes.
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