The smallest portion of blood-borne carbon dioxide is: a. dissolved in the blood

Question

The smallest portion of blood-borne carbon dioxide is: a. dissolved in the blood plasma b. bound directly to hemoglobin c. converted into bicarbonate (HCO_3) d. is bound to plasma proteins such as albumen e. is converted into chloride, which then leaves the red blood cell Which of the following about glomerular filtration is false: a. glucose is able to filter across the glomerulus b. the basement membrane of the glomerulus has multiple positive charges c. red blood cells and white blood cells do not filter d. albumen and the globulins usually do not filter across the glomerulus e. the glomerular capillaries are more permeable than regular capillaries

Explanation / Answer

33.a Transport of carbon dioxide in the blood is considerably more complex. A small portion of carbon dioxide, about 5 percent, remains unchanged and is transported dissolved in blood. The remainder is found in reversible chemical combinations in red blood cells or plasma. Some carbon dioxide binds to blood proteins, principally hemoglobin, to form a compound known as carbamate. About 88 percent of carbon dioxide in the blood is in the form of bicarbonate ion. The distribution of these chemical species between the interior of the red blood cell and the surrounding plasma varies greatly, with the red blood cells containing considerably less bicarbonate and more carbamate than the plasma.

34.

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