How does feedback mechanism regulate the hormone action? Explain with the help of an example.
The presence or absence of a particular hormone can regulate its further formation with the help of a regulatory mechanism called feedback mechanism. Example: Hypothalamus regulates thyroxin levels in blood by secreting thyroid stimulating hormone (TSH). If the thyroxine levels increases then hypothalamus stop secreting TSH in order to reduce the production of thyroxine from thyroid gland. Low levels of thyroxin in blood again switches on the release of TSH from hypothalamus to increase levels of thyroxin in blood.
