Question

adren·a·line
 ( or chiefly Brit   adren·a·lin) /əˈdrɛnələn/  noun   [  noncount  ]
  : a substance that is released in the body of a person who is feeling a strong emotion (such as excitement, fear, or anger) and that causes the heart to beat faster and gives the person more energy
   It was a thrilling experience that really got our adrenaline going. [=got us very excited]
  ◇ If you experience a rush of adrenaline or an adrenaline rush, you feel very excited and full of energy.
   I felt a rush of adrenaline as I walked onto the stage.