All of the following statements about bronchial circulation are true, except :: (A) Contribute 2% of systemic circulation, (B) Contribute to gaseous exchange, (C) Cause venous admixing of blood, (D) Provide nutritive function to lung
Answer is B. Bronchial circulation does not contribute to gas exchange. Ref: The Mechanics of the Circulation By C. G. Caro, T. J. Pedley, R. C. Schroter, W. A. Seed, K. H. Parker, Page 475; Equine Respiratory Medicine and Surgery By Bruce C. McGorum, Padraic M. Dixon, N. Edward Robinson, Page 34; Medical Physiology : Principles for Clinical Medicine By Rodney Rhoades, David R. Bell, Page 371.