Question

Which one of the following statements is incorrect?
(a) The residual air in lungs slightly decreases the efficiency of respiration in mammals
(b) The presence of non-respiratory air sacs increases the efficiency of respiration in birds
(c) In insects, circulating body fluids serve to distribute oxygen to tissues
(d) The principle of counter-current flow facilitates efficient respiration in gills of fishes

Answer 1

Hey Dear,

◆ Answer -

(a) The residual air in lungs slightly decreases the efficiency of respiration in mammals

◆ Explaination -

• Residual capacity is that portion of air contained in the lungs which can not be expelled even by the most violent expiratory effort.
• Residual air is actually part of dead space & it doesn't play active part in respiration.
• Therefore, residual air in lungs dont affect efficiency of respiration.

Hope this helps you understand..

Answer 2

Answer:

Respiratory process could be achieved due to which it exchanges O2 and CO2 range from the gas. This is suitable for taking right inspiration to ensure the cells, tissues, and includes major organs of the body.

It must undergo with flat shape of these organisms to consider surface area of diffusion. Thus, it allows air flows in one direction while blood flows in another efficient gas exchange.