PATHOLOGY MCQ
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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We inhale oxygen and exhale carbon dioxide
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X
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✓
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -nitrogen – 78% oxygen – 17% carbon dioxide – 4% other gases – 1%.
Detailed explanation-2: -To breathe in (inhale), you use the muscles of your rib cage – especially the major muscle, the diaphragm. Your diaphragm tightens and flattens, allowing you to suck air into your lungs. To breathe out (exhale), your diaphragm and rib cage muscles relax. This naturally lets the air out of your lungs.
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