Exams › NEET › Biology

Which of the following are the correct statement for respiration in human?

1. Cigarette smoking may lead to inflammation of bronchi
2. Neural signals from pneumotaxic centre in pons region of brain can increase the duration of inspiration
3. Workers in grinding and stone-breaking industries may suffer from lung fibrosis
4. About 90% of carbon dioxide (CO2) is carried by haemoglobin as carbamino haemoglobin.

Correct answer: Cigarette smoking may lead to inflammation of bronchi

Solution

Cigarette smoke irritates the bronchi and can cause bronchial inflammation, so that statement is correct. The other options are incorrect because the pneumotaxic center shortens inspiration, stone/grinding workers are prone to silicosis, and most CO2 is carried as bicarbonate, not carbaminohemoglobin.

Related NEET Biology questions

• Skin is an accessory organ of respiration in
• Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.
• Name the chronic respiratory disorder caused mainly by cigarette smoking.
• Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been inhaling polluted air containing unusually high content of
• Reduction in pH of blood will
• Select the correct events that occur during inspiration. (i) Contraction of diaphragm (ii) Contraction of external inter-costal muscles (iii) Pulmonary volume decreases (iv) Intra pulmonary pressure increases

⚔️ Practice NEET Biology free + battle 1v1 →