A) About 90 per cent of \[C{{O}_{2}}\]is carried by haemoglobin as carbaminohaemoglobin.
B) Neural signals from pneumotaxic centre of pons can increase the duration of inspiration.
C) Workers in grinding and stone breaking industries may suffer from lung fibrosis.
D) Cigarette smoking leads to the inflammation of bronchi.
Correct Answer: C
Solution :
In certain industries, especially those involving grinding or stone-breaking, so much dust is produced that the defence mechanism of the body cannot fully cope with the situation. Long exposure can give rise to inflammation leading to fibrosis and thus causing serious lung damage.
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