What is adrenaline?
Adrenaline is a hormone (aka epinephrine) that is released by the adrenal glands to prepare muscles for exertion. Anyone can experience adrenaline if they are angry, frightened, or excited, which causes that person to have an increased heart rate, which helps to prepare the body to react to danger. This also helps with the 'fight or flight' response.
Where is adrenaline produced?
Adrenaline is usually produced by both the adrenal glands and by a small number of neurons located in the medulla oblongata. The adrenal glands are located at the top of each kidney in the human body.