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- 1. Multiple Choice
These organs help our body to breath except
Nasal cavity
Lungs
Trachea
Mouth
- 2. Multiple Choice
Which of the following processes transport oxygen from the alveoli into the capillaries?
Respiration
Inhalation
Exhalation
Diffusion
- 3. Multiple Choice
During exhalation, what will happen to these respiratory organs?
Diaphragm moves downward and flatten
Rib cage moves upwards and outwards
intercostal muscles relax
Intercostal muscles contract
- 4. Multiple Choice
When inhalation
Thoracic cavity become smaller
The air pressure in the thoracic cavity increases
The air pressure n the thoracic cavity decreases
Air is pushed out
- 5. Multiple Choice
The composition of the oxygen in inhaled air is
21%
16%
4%
0.04%
- 6. Multiple Choice
The composition of carbon dioxide in exhaled air is
79%
21%
4%
0.04%
- 7. Multiple Choice
What is diffusion process?
Molecules move from a region of lower concentration to a region of higher concentration
Molecules move from a region of higher concentration to a region of lower concentration
- 8. Multiple Choice
State the products of respiration in the body cells?
Oxygen, carbon dioxide and water
glucose, oxygen and water
carbon dioxide, water and oxygen
carbon dioxide, water and energy
- 9. Multiple Choice
Following are the characteristics of alveoli that make it efficient for gaseous exchange except:
Thin wall of blood capillaries
small surface area of alveoli
Moist wall of alveoli
Dense netword of blood capillaries
- 10. Multiple Choice
What is the name of the compound found in the red blood cells
Oxyhaemoglobin
Haemoglobin
Hormones
Enzymes
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