Which structure in the endocrine system secretes epinephrine and norepinephrine?

• A. Pancreas
• B. Adrenal medulla
• C. Thyroid gland
• D. Pituitary gland

Answer: (B)

Verified step by step guidance

1. Understand the role of the adrenal medulla in the endocrine system. It is part of the adrenal glands, which are located on top of the kidneys.
2. Recognize that the adrenal medulla is responsible for secreting catecholamines, which include epinephrine (adrenaline) and norepinephrine (noradrenaline).
3. Learn that epinephrine and norepinephrine are hormones that play a crucial role in the body's fight-or-flight response, increasing heart rate, blood pressure, and energy supply.
4. Differentiate the adrenal medulla from other endocrine structures such as the pancreas, thyroid gland, and pituitary gland, which have different functions and secrete different hormones.
5. Review the functions of the pancreas, thyroid gland, and pituitary gland to understand why they do not secrete epinephrine and norepinephrine. The pancreas regulates blood sugar, the thyroid gland controls metabolism, and the pituitary gland regulates various hormonal functions.