Question

Which one of the following is the correct statement for respiration in humans?

(a) Cigarette smoking may lead to inflammation of bronchi

(b) Neural signals from pneumotoxic centre in pons region of brain can increase the duration of inspiration

(c) Workers in grinding and stone breaking industries may suffer. from lung fibrosis

(d) About 90% of carbon dioxide (CO₂) is carried by haemoglobin as carbamino haemoglobin

Answer 1

Correct Option (c) Workers in grinding and stone breaking industries may suffer. from lung fibrosis

Explanation:

Irritating gases fumes, dusts, etc. present in the work place result in lung disorders. this is because the deference mechanism of the body cannot fully cope with this situation of so much dust. Long exposure can give rise to inflammation leading to fibrosis and thus causing serious lung damage.