Understanding Sneezing: A Biological Perspective

The video explores why humans and some animals sneeze, explaining it as a reflex to expel irritants and excess mucus. It delves into the role of cilia in the nasal passages, which act like a reset mechanism for the nose. A study by the University of Pennsylvania found that sneezing triggers cilia to clear the nasal environment. However, in sinusitis sufferers, this reset mechanism may not function properly, offering insights for potential treatments. The video concludes with a call to support SciShow on Patreon.

What is a common reflex action shared by humans and some animals like cats and dogs?

• Hiccuping

• Yawning

• Sneezing

• Coughing

What triggers the brain to initiate a sneeze?

• Irritants like dust and pollen

• Bright lights

• Excessive saliva

• Loud noises

What is the technical term for sneezing?

• Sternutation

• Expectoration

• Osculation

• Deglutition

What did researchers from the University of Pennsylvania grow to study sneezing?

• A tiny lung

• A tiny nose

• A tiny ear

• A tiny eye

What role do cilia play in the nasal environment according to the study?

• They produce mucus

• They act as a broom to reset the nasal environment

• They detect smells

• They filter oxygen

What happens to cilia after a sneeze in healthy individuals?

• They change color

• They stop moving

• They move faster to clear irritants

• They grow longer

What is the purpose of the cilia's 'reboot' function in the nose?

• To clear out irritants and reset the nasal environment

• To increase airflow

• To enhance smell

• To produce more mucus

What condition is associated with cilia that do not reset properly after a sneeze?

• Asthma

• Chronic sinusitis

• Allergies

• Bronchitis

What symptom is NOT typically associated with sinusitis?

• Runny nose

• Nasal congestion

• Sore throat

• Inflamed sinuses

How might the study's findings help in medical research?

• By developing new vaccines

• By creating better nasal sprays

• By improving allergy medications

• By aiding in treatments for sinusitis