Thermogenesis

Essay specific features

 

Issue:

Science

 

Written by:

Mary G

 

Date added:

April 29, 2012

 

Level:

University

 

Grade:

B

 

No of pages / words:

4 / 1050

 

Was viewed:

5482 times

 

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Essay content:

Shivering can be partially suppressed by voluntary control.” The skeletal muscles create the shivering. The heat results from friction between muscle elements (the same as during exertion), but no mechanical work is produced because opposing (antagonistic) muscle pairs are activated at the same time...
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Shivering is very effective in increasing body temperature, because muscle activity produces large amounts of heat. (E. N. Marieb, 1992, p. 866) Non-shivering thermogenesis usually occurs in brown adipose tissue (brown fat) that is present in human infants and hibernating mammals. It is a process whereby substances such as free fatty acids (derived from triacylglycerols) remove purine (ADP, GDP and others) inhibition of thermogenin (uncoupling protein-1) which causes an influx of H+ into the matrix of the mitochondria and bypasses the ATP synthase channel...
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