Final answer:
A hormone that controls the secretion of another hormone is referred to as a trophic hormone, often secreted by the anterior pituitary gland.
Step-by-step explanation:
The term for any hormone that controls the secretion of another hormone is a trophic hormone. An endocrine gland may secrete a hormone in response to the presence of another hormone produced by a different endocrine gland. For instance, the anterior pituitary gland produces tropic hormones such as thyrotropic hormone, which stimulates the thyroid gland to produce thyroid hormones.