stimulate the hypothalamus to releaseTRH and this causes the pituitary to releaseTSH so the thyroid releases more thyroxine. So blood levels return to norma
Normal thyroxine levels in the bloodstream
inhibit TRH release from the hypothalamus and the production of TSH by the pituitary, so normal blood levels are maintained
The control of thyroxine levels by the hypothalamus and pituitary gland is an example of ??
