When bacteria are destroyed by leukocytes, pyrogens are released into the blood. Pyrogens reset the bodys thermostat
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When bacteria are destroyed by leukocytes, pyrogens are released into the blood. Pyrogens reset the body’s thermostat to a higher temperature, resulting in fever. How might pyrogens cause the body temperature to rise?
Data in Figure 16.2
Transcribed Image Text:
Body temperature falls. Blood vessels constrict so that heat is conserved. Sweat glands do not secrete fluid. Shivering (involuntary contraction of muscles) generates heat, which warms the body. Heat is retained. Normal body temperature Body temperature rises. Blood vessels dilate, resulting in heat loss to the environment. Sweat glands secrete fluid. As the fluid evaporates, heat is lost from the body. Heat is lost to the environment.
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Related Book For
Concepts Of Biology
ISBN: 9781938168116
1st Edition
Authors: Samantha Fowler, Rebecca Roush, James Wise
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