TED-ED: Why do we cry? The three types of tears - Alex Gendler

Iris is a sensitive character who constantly produces tears. The video explains the three layers of basal tears and their functions. Iris meets Onion, leading to a chemical reaction that causes reflex tears. The video also explores emotional tears, their role in mood stabilization, and their potential social functions. Despite the challenges, Iris's tears help maintain her emotional balance.

What is the primary function of the basal tears that Iris constantly produces?

• To hydrate and protect the eyes

• To signal social submission

• To express emotions

• To wash away harmful substances

What triggers Iris to produce reflex tears when she meets Onion?

• The presence of dirt and debris

• Iris's emotional attachment to Onion

• A chemical reaction from Onion's smell

• Onion's bright purple jacket

How do reflex tears differ from basal tears?

• They contain more antibodies

• They lack an aqueous layer

• They are primarily for emotional expression

• They are produced in smaller amounts

What is one possible reason scientists believe emotional tears are beneficial?

• They are more abundant than reflex tears

• They contain stress hormones that may calm the person

• They help in visual clarity

• They prevent the evaporation of other tear layers

What physical reactions accompany the production of emotional tears?

• Increased heart rate and slower breathing

• Decreased heart rate and faster breathing

• Decreased appetite and energy levels

• Increased appetite and energy levels