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1.
Why does the air in the nasal cavity get warmed?
2.
Haemoglobin (Hb) is a
3.
The figure given below shows a small part of human lung where exchange of gas takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function.
4.
How many molecules of oxygen can bind to a molecule of haemoglobin?
5.
XX' is a part of respiratory system that contains C-shaped rings of hyaline cartilage. 'XX' is lined with ciliated, pseudostratified columnar epithelium. Identify 'XX'
6.
The oxygen toxicity is related with
7.
Arrange the given steps by which the pulmonary volume increases in the sequence of events occurring first
I. Contraction of intercostal muscles
II. Lifting up of the ribs
III. Sternum causing an increase in the volume of the thoracic chamber in dorsoventral axis
IV. Contraction of the diaphragm which increases the volume of the thoracic chamber in antero-posterior axis
Choose the correct option
I. Contraction of intercostal muscles
II. Lifting up of the ribs
III. Sternum causing an increase in the volume of the thoracic chamber in dorsoventral axis
IV. Contraction of the diaphragm which increases the volume of the thoracic chamber in antero-posterior axis
Choose the correct option
8.
Almost same 
in humans is found in
in humans is found in
9.
During swallowing, glottis can be covered by a thin elastic cartilaginous flap called ...A... to prevent the entry of food into larynx. Trachea is a straight tube extending up to ...B... cavity, which divides at the level of 5th thoracic vertebra into right and left primary ...C...
Choose the correct option for A, B and C from the given four options to complete the above statement with reference to NCERT textbook
Choose the correct option for A, B and C from the given four options to complete the above statement with reference to NCERT textbook
10.
Volume of air breathed in and out, while at rest is called