Alveolar Gas Partial Pressures at Rest

question 15

Multiple Choice

Alveolar gas partial pressures at rest

• A) Are relatively constant because the tidal volume is a small fraction of the FRC
• B) Vary widely during each breath because fresh air replaces “stale” alveolar air during each
• breath
• C) Vary widely because the blood squirts through unevenly during each ejection cycle of the
• heart
• D) Are the sam e as those in moist tracheal air
• E) Are relatively constant because the tidal volume is a small fraction of the TLC

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