Just as glucose is the basic building block of carbohydrate, amino acids are the basic building blocks of protein.
Amino acids basically have a significance for everything in our body. Muscles, cells, glands, arteries, organs... they also play an important role in transporting and for stockpiling nutrients.
The best way is to just relax and try to act naturally. Just be calm and try to make it a bit funny to hide fear. :)
