Biology: How Life Works - Standalone book
2nd Edition
ISBN: 9781464126093
Author: James Morris, Daniel Hartl, Andrew Knoll, Robert Lue, Melissa Michael, Andrew Berry, Andrew Biewener, Brian Farrell, N. Michele Holbrook
Publisher: W. H. Freeman
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Question
Chapter 39, Problem 1QC
Summary Introduction
To determine:
The two structural features that favor diffusion.
Concept Introduction:
Diffusion is the natural phenomenon of random movement of molecules from high concentration to lower concentration. Living organism which may be eukaryote or prokaryote exchange the gases by diffusion.
Expert Solution & Answer
Explanation of Solution
The two structural features that favor the diffusion rate are:
- 1. Large surface area – Large surface area for gaseous exchange is required because diffusion rate is directly proportional to the surface area.
- 2. Short diffusion distance – For maintaining the proper rate of diffusion, the distances at which the molecules move should be short. This is because the diffusion rate and distance are inversely proportional to each other.
Conclusion
Large surface area and the short diffusion distance are two structural features that favor the diffusion.
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Chapter 39 Solutions
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