Which Statement About Human Breathing Is True

question 11

Multiple Choice

Which statement about human breathing is true?

• A) It involves countercurrent gas exchange.
• B) With maximum inhalation,a person can breathe in as much air as the lungs can hold.
• C) A residual volume of air remains in the lungs even with maximum exhalation.
• D) There is a long diffusion path between the blood and the air (greater than 0.5 mm).
• E) The partial pressure of O₂ within the alveoli is the same as that of the external air.

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