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Biology Class 11 Chapter 13 - Gaseous Exchange - Part 2
1.
During exercise the breathing rate may rise to:
a) 30 times per minutes
b) 35 times per minutes.
c) 20 times per minutes
d) 25 times per minute
2.
_________ are main source of exchange of gases in plants.
a) Stomata
b) Tracheole
c) Respiratory
d) RBC
3.
Oxygen combines to hemoglobin to form ___________.
a) Respiratory
b) Oxygen
c) Oxyhemoglobin
d) Organ
4.
During inspiration the air enters into the lungs
a) Difference in partial pressure of the gases
b) Voccal cords
c) The muscle of the ribs are relaxed.
d) The muscles of the ribs are contracted
5.
The floor of chest cavity is called diaphragm
a) 5 litres
b) Corncinoma
c) Muscle fibre
d) Sheet skeletal muscle
6.
The irritant substances of smoke generally cause:
a) Smokers yawning
b) Smoker's hiccough
c) Smoker's cough
d) Smoker's sneeze
7.
In the peroxisomes the glycolate is converted into:
a) Serine
b) CO
2
c) Ethanolamine
d) Glycine
8.
In the glottis the mucous membrane is stretched across into fibrous bands
a) The muscles of the ribs are contracted
b) The muscle of the ribs are relaxed.
c) Voccal cords
d) Difference in partial pressure of the gases
9.
During expiration air is given out
a) The muscles of the ribs are contracted
b) Voccal cords
c) Soon after its formation diffuses into mitochondria.
d) The muscle of the ribs are relaxed.
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