What is the name of in-built 'arrangement' in our body which controls the timing and amount of hormones released by various endocrine glands in the body?

What is the name of in-built 'arrangement' in our body which controls

1.	What is the name of in-built 'arrangement' in our body which controls the timing and amount of hormones released by various endocrine glands in the body?
Answer» What is the name of in-built 'arrangement' in our body which controls the timing and amount of hormones released by various endocrine glands in the body?