Gaseous Exchange With Answers

Gaseous Exchange

Sr. # Questions Answers Choice
1 Which of the following is considered the leading cause of lung cancer and other chronic respiratory diseases? Exposure to cold weather Excessive consumption of sugary drinks Smoking tobacco Lack of physical exercise
2 What is the main characteristic of pneumonia, a lung infection? Permanent dilation of bronchi Inflammation of the lining of the lungs and fluid accumulation in alveoli Spasms of the bronchial tubes Destruction of the cilia in the trachea
3 In which respiratory disorder do the walls of the alveoli break down, leading to a reduction in the surface area for gas exchange? Asthma Bronchitis Pneumonia Emphysema
4 Chronic bronchitis is primarily caused by prolonged exposure to which of the following? Viral infections Bacterial infections Air pollution and smoking Genetic predisposition
5 Which respiratory disorder is characterized by inflammation and narrowing of the airways, often triggered by allergens or exercise? Emphysema Bronchitis Asthma Pneumonia
6 What structural feature prevents the trachea from collapsing and ensures a continuous airway? Smooth muscles Elastic ligaments C-shaped cartilaginous rings Bone plates
7 Which gas diffuses from the alveoli into the blood capillaries during the process of gaseous exchange? Carbon dioxide Oxygen Nitrogen Methane
8 What are the tiny air sacs in the lungs where the actual exchange of gases (oxygen and carbon dioxide) occurs? Bronchi Trachea Bronchioles Alveoli
9 Which sequence correctly represents the path of air from the outside environment to the alveoli during inhalation? Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli Larynx → Pharynx → Nasal cavity → Trachea → Bronchi → Bronchioles → Alveoli Nasal cavity → Trachea → Pharynx → Larynx → Bronchi → Bronchioles → Alveoli Pharynx → Nasal cavity → Larynx → Trachea → Bronchi → Bronchioles → Alveoli
10 What is the primary organ responsible for gaseous exchange in humans? Heart Kidneys Lungs Liver
11 Which respiratory disorder is most strongly associated with uncontrolled cell growth in the lung tissues, often linked to smoking? Asthma Emphysema Lung Cancer Tuberculosis
12 Pneumonia is an infection of the lungs that can be caused by bacteria, viruses, or fungi. What is the main effect of pneumonia on the lungs? Thickening of the vocal cords Collapse of the trachea Inflammation and fluid accumulation in the alveoli Hardening of the diaphragm
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