Anatomy Respiratory system 68d6a6a7 All the following statements about Emphysema are true except A Breathlessness is the characteristic presenting symptom B Diffusion rate of carbon monoxide is reduced C Restrictive pattern on pulmonary function test is seen D Long term bronchodilator therapy does not improve lung function High-Yield Explanation The hallmark of Emphysema is air flow obstruction and pulmonary function test show an obstructive patters Ref Harrison 19th edition pg 306e-4