The Respiratory Advantage Provided by a Four-Chambered Heart Over a Three-Chambered

question 52

Multiple Choice

The respiratory advantage provided by a four-chambered heart over a three-chambered heart in vertebrates is

• A)combination of oxygen-rich blood with oxygen-poor blood.
• B)reduction of hemoglobin requirement.
• C)elimination of alveolar dependency.
• D)separation of oxygen-rich blood and oxygen-poor blood.
• E)more blood gets sent to the lungs.

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Definitions:

Discriminant Validity

The extent to which a construct is truly distinct from other constructs by empirical standards, often assessed through its lack of correlation with unrelated constructs.

Convergent Validity

When a scale correlates with other scales measuring the same construct.

Face Validity

When scale items appear, at face value, to measure what they are supposed to measure.

Convergent Validity

The degree to which two measures that theoretically should be related are actually related.