I'm positive that it's the larynx since; the pancreas is an organ behind the stomach, the hypothalamus is a part of the brain, and the thyroid is a part of the neck. The larynx is commonly known as your voice box, helps you speak. That's a part of your respiratory system.
Stress hormones affect your respiratory and cardiovascular systems. During the stress response, you breathe faster in an effort to distribute oxygen and blood quickly to your body core.
