A 26-Year-Old Scuba Diver Returns After a Brief Dive, Complaining

question 10

Multiple Choice

A 26-year-old scuba diver returns after a brief dive, complaining of breathlessness, dizziness, and nausea.The dive shop owner quickly realizes that his assistant has equipped the diver with a CO₂ breathing tank, instead of an O₂ breathing tank.How would the rapid increase in pCO₂ concentration in the diver's lungs change the oxygen saturation curve of hemoglobin shown in Figure 3.4?

• A)It shifts the maximal saturation value from 1.0 to 0.8.
• B)It increases the P50 value of hemoglobin.
• C)It changes the curve to a hyperbolic shape with the same P50.
• D)It makes the slope of the curve steeper at the P50.
• E)It has no effect on the curve shown.

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