Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 48, Problem 3Q
Summary Introduction
To review:
The hypothesis that the fluttering of spiracles might help in preventing the partial pressure of oxygen (PO2) from reaching a toxic level is viable or not.
Given:
Researchers exposed pupae to a different level of atmospheric oxygen (O2) to study the activities of spiracles in differing atmospheric conditions and the effects this might have on the rate of carbon dioxide (CO2) release and O2 concentrations. They then measured levels of CO2 release and O2 concentrations during the fluttering stage. The results are depicted in the graphs shown below:
Introduction:
Primary respiratory organ of insect is trachea, which branches across the body of the insect. Trachea helps in gaseous exchange that is the exchange of CO2 and O2. The intake and outgoing of the gases are maintained by spiracles. The spiracles close and open the trachea or flutters according to need.
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Life: The Science of Biology
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