Video: Adrenal Glands: Epinephrine, Norepinephrine & Stress Adaptation The adrenal medulla is the central portion of the adrenal gland. In this lesson, you will learn about the two hormones secreted by the adrenal medulla - epinephrine and norepinephrine - and how they help you deal with short-term stressors. Biology 105: Anatomy & Physiology / Science Courses