Test: Disorders of Respiratory System (August 6) - NEET MCQ

Cyanosis is blueing of skin, because of deficient of oxygen in blood. Eupnea is normal breathing. Coryza(common cold) is caused by rhino virus.

Grinding or stone breaking industries produce so mud dust that long exposure to this can give rise to inflammatior of lungs leading to fibrosis (proliferation of fibrous tissues' and thus causing serious lung damage. Inflammation ol the bronchi may also be caused by cigarette smoking. The primary function of pneumotaxic center is to limit inspiration which increase breathing rate.

Silicosis and asbestosis are known as occupational disorder as they occur due to one's occuption. Workers working in industries where silica and asbestos are used can suffer from these respiratory disorders.

Both statements (i) and (iv) are correct. Asthma is a difficulty in breathing caused by inflammation of the bronchi and bronchioles, and the binding of oxygen to hemoglobin is primarily related to the partial pressure of O2.

Statements (ii) and (iii) are not correct. The respiratory system starts at the external nostrils and extends to the alveoli, not the terminal bronchioles. The epiglottis is a flap of cartilage that covers the glottis to prevent the entry of food into the larynx during swallowing, not the other way around.

Emphysema is a respiratory disorder which occurs due to the inflation or abnormal distension of the bronchioles or alveolar sacs resulting in the loss of their elasticity. Cigarette smoking and chronic bronchitis are the causes of this disease.