Breathing and Exchange of Gases Question 40
40. Which of the following are the correct statement for respiration in human?
(a) Cigarette smoking may lead to inflammation of bronchi
(b) Neural signals from pneumotaxic 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 $(CO_2)$ is carried by haemoglobin as carbamino haemoglobin.
Show Answer
Answer : c
Hints & Solution
(c) (a) and (c). Neural signals from pneumotaxic center in pons region of brain can limit the duration of inspiration. About 25% of carbon dioxide $(CO_2)$ is carried by haemoglobin as carboxyhaemglobin. The pons contains nuclei that relay signals from the forebrain to the cerebellum, along with nuclei that deal primarily with sleep, respiration, swallowing, bladder control, hearing, equilibrium, taste, eye movement, facial expressions, facial sensation, and posture.
