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301. What is the double membrane enclosing each lung called?
(A) Pleura
(B) Pericardium
(C) Peritoneum
(D) Meninges
302. During inspiration, what happens to the diaphragm?
(A) It relaxes
(B) It contracts and becomes flat
(C) It contracts and bulges
(D) It remains unchanged
(A) Diaphragm contracts
(B) Rib muscles contract
(C) Chest cavity volume increases
(D) Air is expelled out
304. How many known carcinogens does tobacco smoke contain?
(A) 29
(B) 49
(C) 69
(D) 99
(A) Nicotine
(B) Tar
(C) Benzene
(D) Carbon monoxide
(A) Decreased blood pressure
(B) Increased oxygen levels
(C) Increased heart rate
(D) Improved digestion
(A) Nicotine
(B) Tar
(C) Carbon monoxide
(D) Benzene
308. Which condition is caused by inflammation or infection of the bronchi or bronchioles?
(A) Emphysema
(B) Pneumonia
(C) Bronchitis
(D) Asthma
309. What happens to the walls of the alveoli in emphysema?
(A) They become inflamed
(B) They get infected
(C) They get damaged
(D) They expand
310. What is the primary cause of pneumonia?
(A) Viral infection
(B) Bacterial infection
(C) Inflammation due to allergens
(D) Infection in the alveoli
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