Question

What endocrine gland goes to work when you are surprised with a pop quiz?

Answer 1

Adrenal gland.

Explanation:

Adrenaline is released which'll make your pupils dilate, your skin go paler as the blood travels to your muscles, your muscles tense and ready for immediate action. There are other actions like the hydrolysis of glycogen and fats to glucose to provide the muscles with the energy they might need.

However, since you really can't run away from the class, the adrenaline will instead make you feel jittery, nervous and your stomach might hurt you.