10 Questions
Which structure is typically the gas exchange membrane in small unicellular organisms?
Cell membrane
What is the primary purpose of gas exchange in living organisms?
To maintain an efficient system for gas exchange between the cell(s) and the external environment
What specialized structures provide the large area needed for effective gas exchange in most larger organisms?
Gills
Which type of organisms are able to perform sufficient gas exchange across the skin or cuticle that surrounds their bodies?
Small multicellular organisms like flatworms
Why do gases need to move passively by diffusion across a surface in gas exchange?
To provide a means for gases to enter and exit cells and tissues
Gas exchange is the physical process by which gases move passively by diffusion across a ______
surface
In most living things, an efficient system for gas exchange between the interior of the cell(s) and the external environment is ______
required
Some small multicellular organisms, such as flatworms, are also able to perform sufficient gas exchange across the ______ that surrounds their bodies
skin or cuticle
In most larger organisms, specialized structures with convoluted surfaces such as gills, pulmonary alveoli, and spongy mesophylls provide the large area needed for effective gas ______
exchange
These convoluted surfaces may sometimes be internalized into the body of the ______
organism
Test your knowledge of the physical process of gas exchange, where gases move passively by diffusion across various surfaces, including biological membranes. Understand the importance of efficient gas exchange in living organisms.
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