11. A common preservative used in hematology and blood banking reagents is: a) Sodium bicarbonate b) Sodium azide c) Sodium citrate d) Sodium fluoride e) None of the above
12. Romanowsky stains include which ingredients? a) Methylene Blue b) Iodine c) Eosin d) Safranin
13. The blood in a light blue tube will separate into these components when centrifuged: a) Blood cells, serum, plasma b) Blood cells, buffy coat, plasma c) Serum, buffy coat, clot d) Plasma and clot e) Serum and clot
14. If small clots are noted when making a blood smear, one should: a) Make the smear and note on the slide that clots are present b) Mix the blood specimen for one hour then make the smear c) Do nothing; small clots will not affect a blood smear d) Request a new specimen before doing the blood smear e) Add more anticoagulant to the blood tube, mix, then make the blood smear
15. What is the purpose of doing a differential? a) To determine the proportion of RBCs in the whole blood b) To count the number of WBCs in whole blood c) To determine the proportion of WBCs in whole blood d) To microscopically examine RBCs and platelets e) To diagnose anemia