10th Class Biology Solved MCQS
Smoking may also lead to the cancers in:
All of them
Kidneys and pancreas
Breast and bladder
Oral cavity and larynx
What percentage of oxygen inhaled form air during breathing?
23%
24%
21%
22%
The glottis is guarded by a flap of tissue called:
Bronchi
Trachia
Epiglottis
Glottis
Which disease is involved in the breakdown of air sacs of the lungs?
Emphysema
Asthema
Bronchites
Pneumonia
The structural and functional unit of lungs is:
trachea
broncioles
alveolus
pharynx
Cutting of walls of Alveoli called:
Asthama
Pneumonia
Emphysema
Bronchtis
Every year World Day is celebrated on:
21-Mar
31-May
30-May
31-Mar
Which gas us absorbed through stomata of plant during night?
Carbon dioxide
Nitrigen
Hydrogen
Oxygen
Which kind of blood vessels are present around the alveoli?
Arteriole
Veins
Artery
Capillary
The length of trachea is:
12 cm
22 cm
20 cm
10 cm
During exercise or other hard physical works the breathing rate may increase up to.
50-60 times per minute
60-70 times per minute
70-80 times per minute
30-40 times per minute
Main role to give out air form lungs is;
Bronchi
Bronchiote
Diaphragm
Bronchus
Total chemicals in tobacco smoke are:
4000
2000
1000
3000
The uncontrolled cell divisions in lungs tissue is called:
cancer
emphysema
Asthma
bronchitis
Most of the gaseous exchange in a leaf occurs through.
Stomata
General surface
Cuticle
lenticels
In wood seems and roots the gaseous:
epidermal cells
micropyle
lenticels
somata
In which of the following disease, the patient has usually lost 50% to 70% of his/her lung tissue when symptoms appears?
Bronchitis
Pneumonia
Asthma
Emphy sema
The length of trachia is __________ cm approximately:
10
14
16
12
What type of blood vessels surrounds the alveoli?
Artery
Capillary
Vein
Arteriole
Lungs are enclosed in a membrane called;
peritonium
pleural membrane
epidermis pericardium
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