If you are looking for the name of the hormone it will be called Melatonin
There actually should be a change of heart rate because sense your body would contain all of this energy, your heart rate would be pounding pretty fast at a constant speed until you feel the need to rest from your hyperness of energy.
It should be around (90-100%) of the MAX heart rate that it should be reaching. Any higher, and you could have some health problems. Therefore, your correct answer would be the very (first option).
Tell her boss. She should not contaminate a sterile tray.
