7.3: thyroxine controls metabolic rate (negative feedback loops)
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Last updated 10:51 PM on 3/24/26
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7 Terms
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What does thyroxine regulate?
Metabolic rate - how quickly reactions occur
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What is metabolic rate important for?
Growth and development
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What is a negative feedback loop?
A biological response to conditions changing from the ideal point, used to return the levels to the optimum
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What do low levels of thyroxine stimulate?
TRH - thyroxine regulating hormone in the hypothalamus
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What does TRH stimulate?
TSH - thyroxine stimulating hormone in the pituitary gland
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What does TSH stimulate?
The thyroid gland to produce thyroxine
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What happens when thyroxine levels are normal?
Thyroxine inhibits the release of TRH, which also stops the production of TSH
