Which hormone does the adrenal medulla primarily secrete?

Which hormone does the adrenal medulla primarily secrete?

• A. Adrenaline
• B. Cortisol
• C. Insulin
• D. Glucagon

Answer: (A)

The adrenal medulla primarily secretes adrenaline, also known as epinephrine. This hormone plays a crucial role in the body's response to stress, particularly during the "fight or flight" response. When released, adrenaline increases heart rate, elevates blood pressure, and boosts energy supplies. It acts quickly to prepare the body for rapid action, making it vital in acute stress situations. In contrast, cortisol, which is secreted by the adrenal cortex and plays a role in metabolism and stress response, does not originate from the adrenal medulla. Insulin and glucagon are hormones produced by the pancreas that regulate blood sugar levels but are not related to the functions of the adrenal medulla. Therefore, the secretion of adrenaline by the adrenal medulla is essential for immediate physiological responses during stressful events.

The adrenal medulla primarily secretes adrenaline, also known as epinephrine. This hormone plays a crucial role in the body's response to stress, particularly during the "fight or flight" response. When released, adrenaline increases heart rate, elevates blood pressure, and boosts energy supplies. It acts quickly to prepare the body for rapid action, making it vital in acute stress situations.

In contrast, cortisol, which is secreted by the adrenal cortex and plays a role in metabolism and stress response, does not originate from the adrenal medulla. Insulin and glucagon are hormones produced by the pancreas that regulate blood sugar levels but are not related to the functions of the adrenal medulla. Therefore, the secretion of adrenaline by the adrenal medulla is essential for immediate physiological responses during stressful events.