Question

Why do we often sneeze when we inhale a lot of dust-laiden air? Why do you feel hungry after a physical activity?​

Answer 1

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When we inhale air containing dust particles, the particles get trapped in the hair present in out nostrils. Sometimes, these particles may pass through the hair and enter the nasal cavity. The irritate the mucus lining of the nasal cavity, and as a result we sneeze.

Answer 2

Explanation:

1) We sneeze since the dust particles disturb the lining of our respiratory tract,and an attempt to throw the dust out,our body hence sneezes as tge chest cavity contracts.

2) A physical activity causes the energy present in our body to utilize. This leads to a lack of energy after activity,hence our body indicates lack of emergy by creating a sense of hunger,sothat food can be taken in and energy be produced by respiration.

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