Answer 1

Eustress is positive stress which has a beneficial effect on motivation, performance, and emotional well-being. The body is flooded with Dopamine and Oxytocin.
Distress is negative stress where the body is flooded with emergency response hormones like Cortisol and Adrenaline.

There are two kinds of distress -

1. Acute distress - intense, short term negative stress.
2. Chronic distress - long-lasting, recurrent negative stress.

Eustress makes the person inspired, determined, energized, and 'ready to go'. In distress, the person shows ill effects like headaches, ulcers, fatigue, irritability, depression, increased heart rate, elevated blood pressure. The brain's use of glucose is enhanced.