NEET2006ZoologyBreathing and Exchange of GasesActual
Which one of the following statements is incorrect?
Options
- AThe principle of countercurrent flow facilitates efficient respiration in gills of fishes
- BThe residual air in lungs slightly decreases the efficiency of respiration in mammals
- CThe presence of non-respiratory air sacs, increases the efficiency of respiration in birds
- DIn insects, circulating body fluids serve to distribute oxygen to tissues.
Correct answer
B. The residual air in lungs slightly decreases the efficiency of respiration in mammals
Step-by-step solution
Residual air is the air which remains in the lungs after the most forceful expiration. It is about 1200 ml . As the residual air remains in the lungs, it has no effect on respiration efficiency.