selfish
The id is the chaotic part of the personality. It includes human's basic, instinctual drives.
The ego is the mediator between the id and reality. It
compensates the id's impulsiveness with reality. It delays gratification and
enables the person to function effectively.
The imbalance of these interacting powers will cause a
disruption in the personality.
They lowered the risk of food being over/undercooked
The answer is The ventricle
Slow down or stop all together as enzymes are substances that speed up and help reactions without being used up themselves.
They are like catalysts(inorganic version of enzymes)