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

Options

A. Cigarette smoking may lead to inflammation of bronchi
B. Neural signals from the pneumotoxic center in the pons region of the 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 `(CO_(2))` is carried by hemoglobin as carbamino-hemoglobin

Answer

A

Explanation

Neural signals from the pheumatoxic center in the pons region of the brain decrease the duration of inspiration.
∗ Pulmonary fibrosis is due to environmental agents such as asbestos, silica, exposure to certain gases and radiation.
∗ About 70% of carbon dioxide is carried by hemoglobin.