PATHOLOGY MCQ
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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breathe in oxygen and breathe out carbon dioxide.
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breathe in carbo.
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breathe in helium and breathe out oxygen.
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breathe in oxygen and breathe out helium.
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Detailed explanation-1: -When you inhale (breathe in), air enters your lungs, and oxygen from that air moves to your blood. At the same time, carbon dioxide, a waste gas, moves from your blood to the lungs and is exhaled (breathed out). This process, called gas exchange, is essential to life.
Detailed explanation-2: -Human beings do exhale almost three billion tons of carbon dioxide annually, but the carbon we exhale is the same carbon that was “inhaled” from the atmosphere by the plants we consume.
Detailed explanation-3: -The average human exhales about 2.3 pounds of carbon dioxide on an average day. (The exact quantity depends on your activity level-a person engaged in vigorous exercise produces up to eight times as much CO2 as his sedentary brethren.)