What is feedback mechanism of hormones explain by giving explain?
Answers
Hey there buddy!
Homoestasis is the maintenance of favourable internal environment. It is largely regulated by hormones though feedback mechanism. The concentration of hormones must be, therefore, kept at optimum level.
Feedback mechanism is a regulatory mechanism in which presence of certain level of substance promotes or inhibits it's further formation. In our body, the timing and amount of hormone released are regulated by feedback mechanisms. Feedback control happens in 2 ways- positive feedback control and negative feedback control.
I would like to explain it further by giving 2 examples: 1) regulation of insulin 2)regulation of thyroxine.
REGULATION OF INSULIN
If the sugar level in the blood rises, it is detected by cells of the pancreas which respond by producing more insulin. As the blood sugar level falls, insulin secretion is teduced. Thus, the blood-sugar level is maintained in a healthy person.
REGULATION OF THYROXINE
If the level of thyroxine is less than normal amount in the blood, thyroxine level stimulates the hypothalamus to secrete more of TRH(Thyrotropin Releasing Hormone), which results in the increased secretion of TSH(Thyroid Stimulating Hormone) which in turn stimulates increased secretion of thyroxine. This is called positive feedback control.
A high amount of thyroxine in the blood exerts an inhibitory effect on hypothalamus in such a way that less of TRH is produced which in turn reduces the secretion of TSH from pituitary gland. This eventually results in decrease of thyroxine. This is called negative feedback control.
Hope you find the answer useful!
