Q. All of the following are associated with inspiration in a mammal except:

Solution:

Inspiration or inhaling is the process of taking in the atmospheric air. This process involves contraction of muscles. The external intercostals muscles undergo contraction. Simultaneously, the diaphragm muscles also contract and it becomes flattened sheet. This increases the thoracic volume and decreases the pleural pressure [from $756\,mm\, Hg$ to $754\, mm\,Hg$] and also the intra pulmonary pressure [from $760\,mm\,Hg$ to $758\,mm\,Hg$]