Why Do We Sneeze

The video explores the reasons behind sneezing, initially explaining it as a reflex to expel irritants and excess mucus. It delves into the role of cilia, tiny hair-like structures in the nose, which help reset the nasal environment after a sneeze. A study showed that cilia become highly active post-sneeze, acting like a broom to clear the nasal passage. However, in people with sinusitis, this cilia activity is impaired, suggesting a potential area for treatment development.

What is the primary function of sneezing according to the initial explanation?

• To improve breathing efficiency

• To remove irritants and excess mucus from the nose

• To regulate body temperature

• To clear the throat

What triggers the sneezing reflex in the body?

• A signal from the heart

• A signal from the brain

• A signal from the stomach

• A signal from the lungs

What role do cilia play in the nasal passages during a sneeze?

• They produce mucus

• They decrease nasal pressure

• They act as a broom to reset the nasal environment

• They increase blood flow

What was the main finding of the study regarding cilia activity after a sneeze?

• Cilia stop moving completely

• Cilia move slower than usual

• Cilia change direction

• Cilia move back and forth repeatedly for several minutes

How might chronic sinusitis be related to cilia function?

• Cilia become too long

• Cilia produce too much mucus

• Cilia cannot reset properly after a sneeze

• Cilia beat too fast