Final answer:
The pituitary gland controls other endocrine glands by releasing hormones that stimulate or inhibit hormone production.
Step-by-step explanation:
The pituitary gland is called the control center of the endocrine system because it controls the other endocrine glands. It releases hormones that either stimulate or inhibit hormone secretion by other glands in response to signals from the hypothalamus. For example, the pituitary gland releases thyroid-stimulating hormone (TSH) to stimulate the thyroid gland to produce thyroid hormones. It also releases adrenocorticotropic hormone (ACTH) to stimulate the adrenal glands to produce cortisol.