To Become Bound to Hemoglobin for Transport in a Mammal,atmospheric

question 67

Multiple Choice

To become bound to hemoglobin for transport in a mammal,atmospheric molecules of oxygen must cross

• A)zero membranes-oxygen binds directly to hemoglobin,a protein dissolved in the plasma of the blood.
• B)one membrane-that of the lining in the lungs-and then bind directly to hemoglobin,a protein dissolved in the plasma of the blood.
• C)two membranes-in and out of the cell lining the lung-and then bind directly to hemoglobin,a protein dissolved in the plasma of the blood.
• D)four membranes-in and out of the cell lining the lung and in and out of the endothelial cell lining an alveolar capillary-and then bind directly to hemoglobin,a protein dissolved in the plasma of the blood.
• E)five membranes-in and out of the cell lining the lung,in and out of the endothelial cell lining an alveolar capillary,and into the red blood cell-to bind with hemoglobin.

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