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July 29, 2015

Homework Help: biology

Posted by Taylor on Sunday, April 18, 2010 at 5:32pm.

When TSH reaches a very high level, What does it do?

A- causes TRH to be released
B- causes thyroxine to be released
C- turns off TRH production
D- turns off thyroxine production
E- turns off TSH production

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