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NEET Biology Solved Question Paper 2007

Multiple Choice Questions

41.

Which form of reproduction is correctly matched?

Euglena $\to$ transverse binary fission
Paramecium $\to$ longitudinal binary fission
Amoeba $\to$ multiple fission
Plasmodium $\to$ binary fission

42.
Which of the following match is correct?

Emphysema : reduction of surface area of alveoli and bronchi

Pneumonia : occupational disease with asbestos

Silicosis : inflammation of alveoli

Asthma : excessive secretion of bronchial mucus

Emphysema : reduction of surface area of alveoli and bronchi

Emphysema means abnormal accumulation of air in the tissues (lungs). In pulmonary emphysema, the air sacs (alveoli) of the lungs are enlarged and damaged, which reduces the surface area for the exchange of oxygen and carbon dioxide. Severe emphysema causes breath-lessness, which is made worse by infections.

Pneumonia is inflammation of the lung caused by bacteria, in which the air sacs (alveoli) become filled with inflammatory cells and the lung becomes solid. The symptoms include those of any infection (fever, malaise, headaches, etc.), together with cough and chest pain.

Silicosis, a lung disease, is a form of pneumoconiosis produced by inhaling silica dust particles. It affects workers in hard-rock mining and tunnelling, quarrying, stone dressing, sand blasting, and boiler scaling. Silica stimulates fibrosis of lung tissue, which produces progressive breathlessness and considerebly increased susceptibility to tuberculosis.

Asthma is the condition of subjects with widespread narrowing of the bronchial airways, which changes in severity over short periods of time (either spontaneously or under treatment) and leads to cough, wheezing, and difficulty in breathing.