Yes.
I had done a piece of coursework about the endocrine system and I did find out that the endocrine glands are in fact ductless.
The other way around. The pituitary is in charge. But there is feedback : adrenals to hypothalamus to pituitary to adrenals.
Because an endocrine glad does not have a tube through which it delivers hormone to the body. They just release their hormones into the space around the gland, which diffuse into the blood stream.