The agglutinogens (or antigens) that determine the ABO and Rh blood types are
A. found in the cytosol of the erythrocytes.
B. located in the cytosol of the leukocytes.
C. part of the reticular connective tissue of the spleen.
D. located on the surface of the leukocytes.
E. found on the surface of erythrocytes.
Answer: E
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Somatostatin is produced in the stomach by ________ cells.
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