¿Qué son los escalofríos, los bostezos, la risa, el llanto y el hipo?

The video explores various involuntary human reactions such as tears, yawning, hiccups, laughter, and chills. It explains the types of tears and their functions, the mystery of yawning and its contagious nature, the causes and theories behind hiccups, the science of laughter and its health benefits, and the origins of chills and goosebumps. These phenomena are linked to biological, emotional, and evolutionary aspects, highlighting their roles in communication, empathy, and survival.

What are the three types of tears produced by humans?

• Emotional, chemical, and physical

• Reflex, emotional, and physical

• Basal, reflex, and chemical

• Basal, reflex, and emotional

Which chemical is released in emotional tears that helps reduce pain?

• Adrenaline

• Leucine enkephalin

• Endorphins

• Corticotropin

What is one proposed function of yawning?

• To improve digestion

• To cool the brain

• To enhance vision

• To increase stress

Why is yawning considered contagious?

• It is a sign of fatigue

• It is a reflex action

• It helps in digestion

• It is a sign of empathy and social bonding

What is one hypothesis about the origin of hiccups?

• They are a reflex from amphibian ancestors

• They are caused by dehydration

• They are a sign of happiness

• They are a result of overeating

What is one theory about why we laugh?

• To improve digestion

• To signal danger

• To increase stress

• To reinterpret information in a surprising way

What causes goosebumps according to the pilo motor reflex?

• Lack of oxygen

• Release of adrenaline

• Increase in body temperature

• Decrease in blood pressure