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1
The hair, present in the nostrils, stop the dust and germs, from entering the _________________ .
Respiratory system
Digestive system
Excretory system
None of these.
2
From which of the following does alveoli originate?
Trachea
Bronchi
Bronchioles
Pharynx
3
Which gas is inhaled by human beings?
Carbon dioxide
Carbon monoxide
Oxygen
Nitrogen
4
Which one of the following takes place in the lungs?
Food is stored
Waste material is filtered from the blood.
Gas exchange
Food is digested
5
The function of hair follicles inside the nose is
to control the amount of air being inhaled
to moisten the air
to detect the presence of oxygen in air
to trap germs and dust particles in the air
6
Diaphragm is a ________________ which is present between the chest and abdomen.
Membrane
Cell membrane
Rib cage
None of these .
7
____________ is a part of respiratory system .
Larynx
Both A and B
8
Lungs are present in chest cavity. This cavity is surrounded by ribs on the sides. A large muscular sheet called diaphragm form the floor of the chest cavity. During inhalation the ribs move_____________ and diaphragm moves____________.
down, up
up, down
up , up
down , down
9
Bronchi divide into
bronchus
bronchioles
alveoli
air sacs
10
What is the voice producing,box like structure in human beings called?
pharynx
Alveoli
11
Exchange of gases in the mammals takes place through
trachea
bronchi
none of these
12
Which of the following are correct ?
(a) The nasal cavity leads into an organ called the pharynx.
(b) The opening of pharynx, into the larynx, is guarded by a valve called the epiglottis.
Only (a) is correct.
Only (b) is correct.
Both (a) and (b) is correct.
13
Which of the following forms the floor of the chest cavity?
Lungs
Diaphragm
Pleura
14
(a) Air enters the nose through the nasal cavity.
(b) Nasal cavity is an air- filled, hollow and large space that is present below the nose and in the middle of the face.
(c) The hair, present in the nostrils, stop the dust and germs, from entering the respiratory system.
Only (a) and (b) is correct .
Only (a) and (c) is correct .
Only (b) and (c) is correct .
All of these.
15
(b) The hair, present in the nostrils, stop the dust and germs, from entering the respiratory system.
(c) Nasal cavity is an air- filled, hollow and large space that is present above the nose and in the middle of the face.
Only (a) and (b) is correct.
Only (b) and (c) is correct.
Only (a) and (c) is correct.