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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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raytaylor77 raytaylor77
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6 years ago
What error was probably made if red cells are seen when attempting to manually count white blood cell (WBCs) on a hemocytometer?
 
  a. The Unopette was not mixed before charging the hemocytometer.
  b. Diluent was squeezed out and lost when filling the Unopette.
  c. The wrong dilution was made.
  d. The Unopette was not allowed to sit for 10 minutes for complete red blood cell (RBC) lysis.
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#1
6 years ago
ANS: D
It requires about 10 minutes for complete lysis of RBCs in the WBC Unopette. If this time is shortened, then red cells may still be intact and therefore visible when the chamber is examined under the microscope. It will be almost impossible to count the white cells because their relative number is so small compared with that of the red cells.
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