Onions, Emotions, and Why We Cry

The video explores the reasons behind human crying, highlighting three types of tears: basal, reflex, and emotional. Basal tears keep eyes lubricated, reflex tears protect against irritants, and emotional tears are linked to feelings. Emotional tears have a unique chemical composition, containing proteins and stress hormones, which may help relieve stress. Theories suggest emotional tears serve as social signals, enhancing communication and empathy, and promoting group bonding.

What are the three types of tears mentioned in the video?

• Primary, secondary, and tertiary

• Dry, wet, and moist

• Happy, sad, and angry

• Basal, reflex, and emotional

What is the primary function of basal tears?

• To express emotions

• To protect against irritants

• To keep the eyes lubricated

• To signal distress to others

How do reflex tears help when chopping onions?

• They contain proteins that relieve stress

• They prevent the eyes from drying out

• They wash away irritants like sulfuric acid

• They signal to others that you are in distress

What unique chemical is found in emotional tears?

• Sulfenic acid

• Prolactin

• Sulfuric acid

• Enzymes

What is one proposed purpose of emotional tears?

• To keep the eyes moist

• To enhance vision clarity

• To protect against wind and dust

• To signal distress and promote social bonding