Onions, Emotions, and Why We Cry

How many different types of tears do humans produce?

• 1

• 2

• 3

• 4

What is the main function of basal tears?

• To wash away irritants

• To express emotions

• To keep eyeballs lubricated and protected

• To release stress hormones

Why do onions make people cry?

• They release a gas that turns into sulfuric acid in the eyes

• They contain a chemical that causes allergic reactions

• They are very cold and shock the eyes

• They release a strong odor that irritates the nose

What is a key difference in the chemical content of emotional tears compared to other types of tears?

• They contain more water

• They are mostly made of salt

• They are loaded with protein and stress hormones

• They have a higher sugar content