The posterior lobe of the pituitary gland is not a true endocrine gland because posterior lobe of the pituitary gland is not a true endocrine gland because is unable to function as an endocrine tissue because it is actually part of the neural system due to its locationembryonically it was an endocrine tissue, but in the adult human it is no longer functionalit is only a hormone storage area that receives hormones from the hypothalamus for releaseit is strictly a part of the neural system and has little or nothing to do with hormonal release