Which gland secretes adrenaline?

The adrenal medulla is the correct answer because it is the inner part of the adrenal glands that specifically produces and secretes adrenaline, also known as epinephrine. This hormone plays a crucial role in the body’s stress response, often referred to as the "fight-or-flight" response. When the body perceives a stressful situation, the adrenal medulla releases adrenaline into the bloodstream, leading to physiological changes such as increased heart rate, blood flow to muscles, and heightened alertness.

The other glands listed, while important in their own rights, do not produce adrenaline. The pancreas is involved in the regulation of blood sugar through insulin and glucagon, the ovaries produce hormones related to female reproductive health, and the thyroid gland regulates metabolism through hormones like thyroxine and triiodothyronine. Each gland has its unique functions, but only the adrenal medulla is associated with the secretion of adrenaline.