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Drag \"True\" or \"False\" to the end of each statement. True False According to

ID: 219179 • Letter: D

Question

Drag "True" or "False" to the end of each statement.

True

False

According to the data, hemoglobin would have 50% O2 saturation when the tissue has a partial pressure of oxygen of about 25 mm Hg.

The student has correctly shown that the O2 saturation of hemoglobin is the dependent variable.

The saturation of O2 changes slowly at the low and high regions of the curve, but rapidly in the middle.

The student has correctly shown that there are three regions of the curve.

The student should have shown that there is a linear relationship between the two variables.

True

False

According to the data, hemoglobin would have 50% O2 saturation when the tissue has a partial pressure of oxygen of about 25 mm Hg.

The student has correctly shown that the O2 saturation of hemoglobin is the dependent variable.

The saturation of O2 changes slowly at the low and high regions of the curve, but rapidly in the middle.

The student has correctly shown that there are three regions of the curve.

The student should have shown that there is a linear relationship between the two variables.

100 ? e 80 660 low change Fast change 2 20 low change 20 3 40 Po2 (mm Hg) in blood within tissue

Explanation / Answer

1. False

P50 is PO2 at which hemoglobin is 50% saturated

In lungs PaO2 ? 100 mm Hg .Hemoglobin % saturation ? 100% whereas, in peripheral tissuesPvO2 ? 40 mm Hg Hemoglobin % saturation ? 75%

As per the graph, at 25 mm Hg, the oxygen saturation level is about 30%.

2. True

The graph clearly demonstrated that the oxygen saturation is a dependent variable. The level of oxygen saturation varies with change on pO2

3. &4. True

There are two regions of slow change and one region of fast range. All three regions are correctly labelled.

5. False

The relationship of two variables is nonlinear as the rate of change is fast in middle and slows at both ends.

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