Response to stress or danger that increases the heart rate and blood pressure, preparing the body to fight or flee: 2. The ‘feel-good’ hormones such as serotonin so you feel less pain:
3. Controls how much sugar is in the blood maintains balance to prevent diabetes:
4. What time you go to sleep and when you usually wake up in the morning:

Response to stress or danger that increases the heart rate and blood pressure, preparing the body to fight or flee: Adrenaline

The ‘feel-good’ hormones such as serotonin so you feel less pain: dopamine

Controls how much sugar is in the blood maintains balance to prevent diabetes: Insuline

What time you go to sleep and when you usually wake up in the morning: Melatonin