Final answer:
The pituitary gland consists of two distinct portions: the anterior pituitary and the posterior pituitary. These regions secrete nine different peptide or protein hormones.
Step-by-step explanation:
The pituitary gland consists of two distinct portions: the anterior pituitary and the posterior pituitary. The anterior pituitary is regulated by releasing or release-inhibiting hormones produced by the hypothalamus, while the posterior pituitary receives signals from the hypothalamus to release hormones. These two regions of the pituitary gland secrete a total of nine different peptide or protein hormones.