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Questions and Answers
What is the primary site of gaseous exchange in humans?
What is the primary site of gaseous exchange in humans?
- Trachea
- Diaphragm
- Alveoli (correct)
- Bronchi
What is the main function of the alveoli in the mammalian gaseous exchange system?
What is the main function of the alveoli in the mammalian gaseous exchange system?
- To warm and humidify the air
- To regulate breathing rate
- To exchange oxygen and carbon dioxide (correct)
- To filter out dust and particles
What is the characteristic of the walls of the alveoli?
What is the characteristic of the walls of the alveoli?
- Thin and one cell thick (correct)
- Thin and three cell thick
- Thick and cartilaginous
- Thick and muscular
Why is the blood supply to the alveoli important?
Why is the blood supply to the alveoli important?
How many alveoli are present in each lung?
How many alveoli are present in each lung?
What happens to the oxygen concentration in the alveoli during inspiration?
What happens to the oxygen concentration in the alveoli during inspiration?
In which direction does oxygen diffuse across the alveolar and capillary wall?
In which direction does oxygen diffuse across the alveolar and capillary wall?
What is the direction of carbon dioxide diffusion?
What is the direction of carbon dioxide diffusion?
What is the driving force behind the diffusion of oxygen and carbon dioxide?
What is the driving force behind the diffusion of oxygen and carbon dioxide?
What is the result of the steep concentration gradient maintained by the blood movement in the alveoli?
What is the result of the steep concentration gradient maintained by the blood movement in the alveoli?
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