Birds Are Able to Extract More Oxygen Than Mammals from an Equal

question 57

Multiple Choice

Birds are able to extract more oxygen than mammals from an equal volume of air. Which of the following statements reflects why birds are able to do so?

• A)Birds have air sacs that enable them to hold their breath for longer, thereby increasing the time for oxygen to diffuse.
• B)Birds have a greater surface area for diffusion because they have air sacs in addition to lungs.
• C)Birds don't have air mixing in their lungs; air flows in a unidirectional manner across the lung surface for increased diffusion.
• D)Birds have capillaries that are in close contact with the lungs.

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Definitions:

Segregated

Separated or divided along racial, sexual, or religious lines, often enforced by law or policy in various societies.

Inferior Facilities

Public or private establishments, such as schools or transportation, of a lower standard, often unequally provided based on racial or socioeconomic status.

NAACP

The National Association for the Advancement of Colored People, a civil rights organization founded in 1909 to fight prejudice, lynching, and Jim Crow segregation.

Sweatt and McLaurin

Reference to Sweatt v. Painter and McLaurin v. Oklahoma State Regents, landmark U.S. Supreme Court cases that challenged segregation in higher education.