After Hyperventilating for Several Minutes, a Person May Develop Short

question 143

Multiple Choice

After hyperventilating for several minutes, a person may develop short periods of apnea because

• A) blood pH would drop and inhibit inspiration.
• B) oxygen in the lungs has not had time to diffuse into the blood.
• C) the level of oxygen has increased and inhibits the inspiratory center.
• D) the level of CO₂ decreases below the level necessary to stimulate the inspiratory center.
• E) blood pH will rise and stimulate expiration.

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Alternative explanations that could challenge the causal relationship between variables in a study.

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The degree to which participants, variables, or groups in a study are similar or uniform in characteristics or conditions.

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