Question 7 of 16beginner💡 UnderstandShort Answer2 marks

We often sneeze when we inhale a lot of dust-laden air. What can be possible explanations for this?

Correct Answer

When we inhale dust-laden air, the dust particles enter our nasal passages.

The nasal passages contain tiny hair and mucus that help trap dust and dirt from the air we breathe in.

When a large amount of dust enters, these protective mechanisms become overwhelmed, and the body responds by triggering a sneeze.

Sneezing is a protective reflex that forcefully expels the dust particles from the nasal passages, clearing the airway and preventing the dust from reaching the lungs.

Exercise: Let Us Enhance Our Learning | Q: 7 | (Page Page 15)
For More Understanding

Explanation

The chapter mentions that 'tiny hair inside your nostrils, along with mucus, help trap dust and dirt from the air we breathe in. This is why we should breathe through the nose and not through the mouth.' Sneezing is a natural defence mechanism that helps expel irritants like dust from the nasal passages before they can enter the respiratory system.

Solution Steps

  1. Dust particles enter the nasal passages when we inhale dust-laden air

  2. The nasal passages contain tiny hair and mucus that trap dust and dirt

  3. When a large amount of dust enters, the protective mechanisms become overwhelmed

  4. The body responds by triggering a sneeze as a protective reflex

  5. Sneezing forcefully expels dust from the nasal passages and prevents it from reaching the lungs

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