Laboratory: WBC and RBC Counting

Question 1

Cell count is higher in adults compared to newborns.

WBC Counting

RBC Counting

Both

Neither

Answer 1

Neither

Question 2

Inverted “L” rule is applied in counting

WBC Counting

RBC Counting

Both

Neither

Answer 2

Both

Question 3

There are 2 basic methods in counting: the manual method and using Coulter counter analyzers.

WBC Counting

RBC Counting

Both

Neither

Answer 3

Both

Question 4

Diluting fluid is a weak acid solution.

WBC Counting

RBC Counting

Both

Neither

Answer 4

WBC Counting

Question 5

Sample can be both capillary blood and venous blood

WBC Counting

RBC Counting

Both

Neither

Answer 5

Both

Question 6

Depth factor = 10

WBC Counting

RBC Counting

Both

Neither

Answer 6

Both

Question 7

HPO is used in counting

WBC Counting

RBC Counting

Both

Neither

Answer 7

Both

Question 8

Cell count is corrected in the presence of NRBC

WBC Counting

RBC Counting

Both

Neither

Answer 8

WBC Counting

Question 9

Increased following strenuous physical activity.

WBC Counting

RBC Counting

Both

Neither

Answer 9

Both

Question 10

Cells are counted in each 5 small square in the upper-left large corner square.

WBC Counting

RBC Counting

Both

Neither

Answer 10

Neither

Question 11

4 drops of mixture is discarded after mixing.

WBC Counting

RBC Counting

Both

Neither

Answer 11

Both

Question 12

Area counted factor = 25/5

WBC Counting

RBC Counting

Both

Neither

Answer 12

RBC Counting

Question 13

Whole blood is aspirated up to 0.5 mark

WBC Counting

RBC Counting

Both

Neither

Answer 13

Both

Question 14

Source of error: Improper mixing

WBC Counting

RBC Counting

Both

Neither

Answer 14

Both

Question 15

Cells are counted in 4 large corner squares

WBC Counting

RBC Counting

Both

Neither

Answer 15

WBC Counting

Question 16

Diluting fluid: Formol citrate

WBC Counting

RBC Counting

Both

Neither

Answer 16

RBC Counting

Question 17

Diluting fluid is aspirated up to 101 mark

WBC Counting

RBC Counting

Both

Neither

Answer 17

RBC Counting

Question 18

In healthy individual, WBC falls in the range of _

Answer 18

4.0-11.0 x 10^9/L

Question 19

WBC above 11.0 x 10^9 L is termed _

Answer 19

Leukocytosis

Question 20

White count below normal is known as _

Answer 20

Leukopenia

Question 21

WBC count is slightly higher in the afternoon than in the
morning. True or False?

Answer 21

True

Question 22

WBC may drop below normal values in parasitic infection, radiation and certain drug therapy. True or False?

Answer 22

False

Rationale: WBC may drop in viral diseases, radiation and drug therapy

Question 23

Components of Turk’s diluting fluid

Answer 23

Gentian violet
Glacial acetic acid
Water

Question 24

2% acetic and 1% HCl along with Turks’s diluting fluid is used as WBC diluting fluid. True or False?

Answer 24

True

Question 25

Kimwipes is a brand of hematocytometer?

Answer 25

False Rationale: Brand of cloth/wipes

Question 26

Principle of WBC Count: Whole blood is mixed with a weak acid solution to dilute the blood and hemolyze the WBCs

Answer 26

False Rationale: RBCs should be the one being hemolyzed

Question 27

How many drops should be discarded before usage?

Answer 27

4 drops

Question 28

Reported unit in WBC count

Answer 28

cells/uL

Question 29

In leukopenia, blood should be drawn up until the _ mark?

Answer 29

1

Question 30

In leukocytosis, blood should be drawn up until the _ mark?

Answer 30

0.5

Question 31

Normal RBC range for adult males

Answer 31

4.2-6.0 x 10^12/L

Question 32

Normal RBC range for adult females

Answer 32

3.6-5.6 x 10^12/L

Question 33

Normal RBC range for newborn

Answer 33

5.0-6.5 x 10^12/L

Question 34

Strenuous physical activity tends to _ the red count

Answer 34

Increase

Question 35

_ red cell count is found in polycythemia vera and secondary polycythemia

Answer 35

Increased

Question 36

There are two basic methods used for counting red blood cells

Answer 36

The manual method Electronic cell counter

Question 37

These solutions are examples of what fluid? NSS 3.8% sodium citrate Dacies/Formol citrate Hayem’s Toisson’s Bethell’s Gower’s

Answer 37

Red Count Diluting Fluid

Question 38

To facilitate counting and promote lysis of the red blood cells, whole blood is diluted with an isotonic diluting fluid. True or False?

Answer 38

False Rationale: Isotonic diluting fluid should prevent lysis of RBC

Question 39

In polycythemia/erythemia, blood should be drawn up until the _ mark?

Answer 39

0.3

Question 40

In anemia, blood should be draw up until the _ mark?

Answer 40

1