Which of These Is Demonstrated by the Oxygen-Hemoglobin Dissociation Curve

question 70

Multiple Choice

Which of these is demonstrated by the oxygen-hemoglobin dissociation curve?

• A)The greater the PO₂ of the blood,the greater the dissociation of O₂ from hemoglobin.
• B)At normal resting systemic arterial PO₂,hemoglobin is almost 100% saturated with oxygen.
• C)At normal resting systemic venous PO₂,only about 75% of the hemoglobin is in the form of deoxyhemoglobin.
• D)More additional oxygen binds to hemoglobin when going from a PO₂ of 60 to 100 mmHg,than is added when going from a PO₂ of 40 to 60 mmHg.
• E)As PO₂ increases,the saturation of hemoglobin with oxygen increases linearly.

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Definitions:

Placebo

An inert or innocuous substance given to a patient instead of genuine medication, used in studies to evaluate the efficacy of treatments.

Confederate

An individual who is part of an experiment but pretends to be a participant and is aware of the study's aims.

Experimental

Pertaining to a methodological approach that involves manipulating one variable to determine if changes in one variable cause changes in another variable.

Independent Variable

The variable in an experimental setup that is manipulated or changed to observe its effect on the dependent variable.