| 1 |
The normal breathing rate in buman being is: |
10-40 times per minute
16-20 times per minute
30-40 times per minute
None of these
|
| 2 |
Which of the following is called voice box? |
Trachea
Larynx
Bronchi
Alveoli
|
| 3 |
How many lobs are present in right lung? |
2
3
4
5
|
| 4 |
How many pairs of ribs in humans? |
12
24
26
30
|
| 5 |
C-Shaped cartilaginous rings are present in the wall of. |
Bronchi
Bronchioles
Alveoli
Trachea
|
| 6 |
The length of trachea is: |
10 cm
12 cm
22 cm
20 cm
|
| 7 |
What type of blood vessels surrounds the alveoli? |
Artery
Arteriole
Capillary
Vein
|
| 8 |
The primary chemical stimulus for breathing is the concentration of. |
Carbon dioxide in blood.
Oxygen in blood
Carbon oxide in muscles
Oxygen in muscles.
|
| 9 |
Which structure actively helps in taking the air out of lungs? |
Nasal cavity
Bronchus
Bronchiole
Diaphragm
|
| 10 |
Where does the gaseous exchange occur in humans? |
Pharynx
Trachea
Bronchi
Alveoli
|
| 11 |
How many bronchi are there in the air passageway? |
One
Two
Many
None of these
|
| 12 |
Most of the gaseous exchange in a leaf occurs through. |
Stomata
General surface
Cuticle
lenticels
|
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