The hypothalamus sensing low thyroid hormone levels, Decrease in TRH release, TSH release from the pituitary, Stimulation of the thyroid gland, Thyroxine levels rising.
Explanation:
Low thyroid hormone levels trigger the hypothalamus to release less TRH, which prompts the pituitary gland to release TSH. TSH stimulates the thyroid gland to produce more thyroxine. As thyroxine levels rise, it signals the hypothalamus and pituitary gland to reduce their production of TRH and TSH, maintaining hormone balance.