Process and Purpose of the Sneeze Reflex

The video explains sneezing as a reflex action to expel irritants from the nasal passages. It compares sneezing to a computer reboot, resetting the nasal environment. Various factors like allergens, infections, and bright light can trigger sneezing. The photic sneeze reflex is highlighted, where bright light causes sneezing. The physical process involves chest muscles compressing the lungs, forcing air out at high speed. Sneezes can spread germs over a distance. Common myths, such as the heart stopping during a sneeze, are debunked, and the natural slowing of heart rate is explained.

What is the primary purpose of a sneeze?

• To increase heart rate

• To clear the nasal airways of irritants

• To enhance sense of smell

• To improve lung capacity

Which of the following is NOT a common trigger for sneezing?

• Feathers

• Bright light

• Loud noises

• Cold air

What is the photic sneeze reflex?

• Sneezing due to cold air

• Sneezing triggered by bright light

• Sneezing caused by spicy food

• Sneezing when exposed to loud sounds

How fast can the air expelled during a sneeze travel?

• 10 to 15 miles per hour

• 20 to 25 miles per hour

• 30 to 35 miles per hour

• 40 to 45 miles per hour

What happens to the heart rate during a sneeze?

• It remains unchanged

• It slows down slightly

• It increases significantly

• It stops completely