Subject :NSO Class : Class 7
Read the given passage with a mistake and select
the option that corrects it.
During the process of breathing (inhalation), the
diaphragm muscles contract and be comes dome
shaped. At the same time, intercostal muscles
contract to pull the ribs upwards. This increases
the volume of the chest cavity. Subsequently the
volume of lungs increases. As the air pressure
in the lungs decreases, air moves into the lungs
through the air passage.
A The diaphragm muscles contract and become
flat.
B This decreases the volume of the chest cavity.
C As the air pressure in the lungs increases, air moves
into the lungs through the air passage.
D At the same time, intercostal muscles contract to
pull the ribs downwards.
Ans 1:
Class : Class 8
Option A
Ans 2:
Class : Class 10
Ans 3:
Class : Class 8
OPTION A