| 1 |
How many pairs of ribs in humans? |
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| 2 |
For gaseous exchange the leaf and young stems have in their epidermis: |
- A. Stomata
- B. Lenticels
- C. Companion cell
- D. Guard cells
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| 3 |
A disease involving the breakdown of air sacs of the lungs is: |
- A. Bronchitis
- B. emphysemsa
- C. pneumonia
- D. asthma
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| 4 |
Percentage of CO<sub>2</sub> in exhaled are during breathing is: |
- A. 16%
- B. 4%
- C. 79%
- D. 0.04%
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| 5 |
Glottis is a narrow opening at the floor of: |
- A. Nasal cavity
- B. Nostril
- C. Pharynx
- D. Antibiotics
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| 6 |
Main role to give out air form lungs is; |
- A. Bronchus
- B. Bronchi
- C. Bronchiote
- D. Diaphragm
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| 7 |
The glottis is guarded by a flap of tissue called: |
- A. Trachia
- B. Glottis
- C. Bronchi
- D. Epiglottis
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| 8 |
In man the system of gaseous exchange is: |
- A. digestive system
- B. respiratory system
- C. nervous system
- D. excretory system
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| 9 |
Most of the gaseous exchange in a leaf occurs through. |
- A. Stomata
- B. General surface
- C. Cuticle
- D. lenticels
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| 10 |
What happens during Exhalation? |
- A. Ribs muscles relax
- B. Diaphragm become dome shaped
- C. Pressure on lungs increased
- D. All of these
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