How is the endocrine system able to maintain hormonal concentration in the body?

How is the endocrine system able to maintain hormonal concentration in the body?
Answer:
Hypothalamus is responsible for maintaining the balance of hormones in the body. When any hormone is secreted in large amounts, a signal is sent by the hypothalamus to the secreting gland to lower its secretion.
Whereas when the amount of any hormone is less, hypothalamus sends a signal to the respective gland to increase its functioning.