Gas Exchange
Created Dec 3, 2011
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Side ASide B
what is gas exchange?
Involves respiration in mitochondria. O2 enters and CO2 isreleased
How much of the air we breathe is oxygen?
21% of the air we breathe is oxygen About 76 liters of oxygen per hour consumed...
What does the upper respiratory system consist of?
Nose, mouth, and pharnyx.
What happens to lung volume, the ribcage, and diaphram during inhalation?
When breathing in air, lung volume increases as the ribcage is pulled out and...
What happens to lung volume, the ribcage, and diaphram during exhalation?
When breathing out, lung volume decreases as the ribcage is pulled in and the diaphram...
What does the lower respiratory system consist of and how does the air flow through?
Trachea(windpipe which carries air into the lungs), Bronchi, and lungs. Air flows from...
How does the gas exchange happen in the lower respiratory system?
The bronchus divides into bronchioles which leads to the alveoli. The alveoli are...
How do the gases diffuse?
From high concentration to low concentration. O2 flows into alveoli and CO2...
How does the large surface area facilitate diffusion?
The lung surface area is 90 times more than skin. Oxygen demands depend on size and...
What is important about the distance of diffusion?
The shorter the distance a gas travels, the faster it can reach its destination. Oxygen...
What is the difference between the exchange of gas on land and on water?
Land animals: infolding of body surface to bring air inside Water animals: Gills...
How are the gases transported?
 The gases are transported to the blood and the hemoglobin in the blood transports...
What does the hemoglobin do?
 The hemoglobin in red blood cells picks up oxygen in lungs and "holds" on...
How do insects breathe?
Air is pumped to trachea. Trachea delivers oxygen to tracheoles. Tracheoles...

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