2.During inhalation, the diaphragm is contracted which increases the volume of the lungcavity. During exhalation, the diaphragm is relaxed which decreases the volume of thelung cavity. The given graph is related to the changes in the volume of lungs of a person at a rest over a period of 20 seconds.
Question
(i) How many breaths per minute is
the person taking when at rest?
(a) 15 (b) 15 (c) 17 (d) 20
It is clear from the given graph that the
person is taking 5 breaths per 20 sec,so in 1
minute (60 sec) he will take 15 breaths
(5/20 x 60)
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Class 10 science
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2021-12-19T08:47:49+00:00
2021-12-19T08:47:49+00:00 1 Answer
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Answer ( 1 )
Ans: A
It is clear from the given graph that the
person is taking 5 breaths per 20 sec,so in 1
minute (60 sec) he will take 15 breaths
(5/20 x 60)