The Alinear Rise in Ventilation Observed During Incremental Exercise (I

question 9

Multiple Choice

The alinear rise in ventilation observed during incremental exercise (i.e., ventilatory threshold) is thought to be principally due to

• A) a decrease in arterial PO₂.
• B) an increase in arterial PCO₂.
• C) an increase in arterial pH.
• D) a decrease in arterial pH.

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Definitions:

Ethologists

Scientists who study animal behavior in natural environments, focusing on instinctive or innate behaviors.

Intervening Variable

A variable that mediates the relationship between a dependent variable and an independent variable.

Hypothesis

A suggested rationale for an occurrence, offered as an initial basis for more detailed exploration.

Theory

An abstract set of ideas or principles that explains phenomena or aspects of the natural or social world.