Breathing Basics - Part 1

CO2 increases nitric oxide and oxygen delivery when tissues are more active.
True
False
Relaxed breathing increases the carbon dioxide concentration of arterial blood compared to thoracic breathing.
True
False
We only use ¼ of inhaled oxygen and don’t need more.
True
False
We need to conserve CO2 by retaining 85-88% of it.
True
False
The external intercostals account for about 75% of air movement into the lungs during relaxed breathing.
True
False
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