For Air to Flow into or Out of the Lungs,there

question 12

Multiple Choice

For air to flow into or out of the lungs,there must be

• A)a volume gradient established between the atmosphere and the alveoli.
• B)a temperature gradient between the atmosphere and the alveoli.
• C)a pressure gradient established between the atmosphere and the alveoli.
• D)a diffusion gradient between the atmosphere and the alveoli.
• E)None of these choices is correct.

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