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Q.

Read the following steps of inspiration.
(A) Increase in thoracic volume
(B) Air moves into lungs
(C) Contraction of diaphragm and external intercostals
(D) Increase in pulmonary volume
(E) Decrease in the intrapulmonary pressure 
Find out the correct sequence of the above steps.

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An Intiative by Sri Chaitanya

a

A, B, C, D, E 

b

C, D, A, E, D

c

C, E, D, A, B

d

C, A, D, E, B

answer is C.

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Detailed Solution

Steps of inspiration:

(C) Contraction of diaphragm and external intercostals

(A) Increase in thoracic volume

(D) Increase in pulmonary volume

(E) Decrease in the intrapulmonary pressure 

(B) Air moves into lungs

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