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In Rouleaux, red blood cells appear as stacked coins - formation occurs as the result of elevated globulins or fibrinogen.
The RBCs indicated by the arrows in this illustration are the result of:
When making a platelet concentrate, the proper procedure is to start with a low centrifugation of the whole blood bag. After the plasma is removed, it is centrifuged again at a higher speed to separate the platelet portion from the plasma portion.
Blood bank
The following steps must be followed in preparation of a platelet concentrate:
HLA-DR is a class II MHC.
HLA-A, HLA-B, and HLA-C are all class I MHC.
Which of the following antigens is classified as a Major Histocompatibility Complex
Class II antigen (MHCII)?