Respiratory Disorders — NEET Biology MCQs with Solutions
Free NEET Biology Respiratory Disorders MCQs with step-by-step solutions (6 questions). Part of Breathing and Exchange of Gases. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Respiratory Disorders · easy · theory
The occupational disease caused by inhalation of silica dust (e.g. in stone-grinding) leading to lung fibrosis is:
A. Pneumonia
B. Silicosis ✓ Correct
C. Asthma
D. Emphysema
Solution: Silicosis (and asbestosis) are occupational lung fibroses caused by inhaling fine mineral dust.
Q2 — Respiratory Disorders · easy · theory
Difficulty in breathing due to inflammation of the bronchi and bronchioles, with wheezing, is characteristic of:
A. Emphysema
B. Silicosis
C. Asthma ✓ Correct
D. Pleurisy
Solution: Asthma involves spasm/inflammation of the bronchi and bronchioles, causing difficulty in breathing.
Q3 — Respiratory Disorders · medium · theory
In emphysema, the difficulty in breathing arises because:
A. Blood cannot carry O₂
B. The bronchi are blocked by mucus only
C. The alveolar walls are damaged, decreasing the respiratory surface ✓ Correct
D. The diaphragm is paralysed
Solution: Emphysema (major cause: cigarette smoking) destroys alveolar walls, reducing the gas-exchange surface area.
Q4 — Respiratory Disorders · medium · theory
Inhaled particles are trapped and prevented from reaching the lungs mainly by the ______ of the respiratory tract:
A. Alveolar sacs
B. Mucus and ciliated epithelium ✓ Correct
C. Diaphragm
D. Pleural fluid
Solution: The mucus lining and cilia of the conducting passages trap dust/microbes and move them out.
Q5 — Respiratory Disorders · hard · theory
A major cause of emphysema is cigarette smoking; a common cause of occupational respiratory disorders is:
A. Long-term exposure to industrial dust/grinding without protective equipment ✓ Correct
B. Excess exercise
C. Eating too much sugar
D. High altitude living
Solution: Occupational disorders (silicosis, asbestosis) result from chronic exposure to industrial dusts; protective masks reduce risk.
Q6 — Respiratory Disorders · hard · theory
Which statement about asthma versus emphysema is correct?
A. Neither affects breathing
B. Both are caused only by bacteria
C. Asthma damages alveolar walls; emphysema inflames bronchi
D. Asthma is due to inflammation/spasm of airways; emphysema is due to alveolar wall damage ✓ Correct
Solution: Asthma = reversible airway narrowing/inflammation; emphysema = irreversible alveolar destruction (often from smoking).