WorksheetsMT312-A Lab_3rd Tri Quiz_Quiz 1
Total questions: 29
Worksheet time: 15mins
Indicate in which part of the hemocytometer you count WBC.
Central large square
Four corner squares
Small squares in the center
Outer border squares
Draw in which part of the hemocytometer do you count RBC.
Central large square
Corner small squares
Entire grid
Outer boundary squares
What is the formula for computing WBC count?
WBC count = (total number of cells counter x DF)/ ((# of squares used x area) x depth)
WBC count = (total number of cells counter x area x depth)/DF
WBC count = (total number of cells counter x DF x area)/depth
WBC count = (total number of cells counter)/ (DF x area x depth)
What is the formula for computing WBC estimate if less than 10 fields were counted?
WBC estimate = (total number of cells counted/# of HPF) x 2000
WBC estimate = (total number of cells counted/# of HPF) x 1000
WBC estimate = (total number of cells counted/# of HPF) x 500
WBC estimate = (total number of cells counted/# of HPF) x 2500
What is the normal relative count for neutrophils in adults?
40-75%
10-30%
80-95%
25-50%
What is the normal relative count for lymphocytes in adults?
20-45%
5-15%
50-70%
70-90%
What is the normal relative count for monocytes in adults?
2-10%
15-25%
0.5-1%
20-40%
Identify one disease that can cause the increase of the following cells after differential counting: basophil
Chronic myelogenous leukemia, allergic reactions
Iron deficiency anemia
Sickle cell anemia
Thalassemia
Aplastic anemia
What is the main function of eosinophil?
Allergic reactions, parasitic infections
Bacterial infections, wound healing
Blood clotting, oxygen transport
Antibody production, viral defense
What is the function of lymphocyte?
Viral infections, chronic lymphocytic leukemia
Bacterial infections, iron deficiency anemia
Parasitic infections, polycythemia vera
Allergic reactions, thrombocytopenia
What is the main function of monocyte?
Chronic infections, tuberculosis, monocytic leukemia
Allergic reactions, asthma, hay fever
Parasitic infections, eosinophilia
Bacterial infections, neutrophilia
What is the main function of lymphocyte?
Bacterial infections, inflammation, stress
Viral infections, allergies, asthma
Parasitic infections, autoimmune diseases, eczema
Fungal infections, cancer, anemia
What is the formula for absolute count of the different WBCs?
Absolute count = (Relative count (%) x Total WBC count) / 100
Absolute count = (Total WBC count x 100) / Relative count (%)
Absolute count = (Relative count (%) + Total WBC count) / 100
Absolute count = (Relative count (%) x 100) / Total WBC count
Identify one cause of shift to the left in differential WBC count.
Increase immature cells, infection (bacterial infection), acute inflammation, stress
Decrease in immature cells, viral infection, chronic inflammation, rest
Increase in mature cells, allergy, recovery phase, exercise
Decrease in total WBC count, parasitic infection, healing, sleep
Identify one cause of shift to the right in differential WBC count.
Recovery from acute infection, drug treatments, nutritional deficiencies, severe inflammation, liver disease, chronic alcoholism, smoking
Iron deficiency anemia, dehydration, polycythemia, hemolytic anemia
Viral infection, allergic reaction, parasitic infestation, asthma
Bone marrow failure, aplastic anemia, leukemia, myelodysplastic syndrome
List down one pathologic cause of decreased WBC count.
Bone marrow diseases, multiple myeloma, aplastic anemia
Iron deficiency anemia
Polycythemia vera
Hemophilia
List down one pathologic cause of increased WBC count.
Infections, inflammation, injury
Dehydration
Excessive exercise
Pregnancy
List down one physiologic cause of decreased WBC count.
Stress, physical stress, reaction to inhaler
Bacterial infection
Iron overload
Vitamin C deficiency
High protein diet
List down one physiologic cause of increased WBC count.
Stress, physical stress, reaction to inhaler
Vitamin C deficiency
Low blood pressure
Dehydration
What is the normal value for the estimated WBC count for adults?
4-11 x×109/L
1-3 x 109 /L
12-18 x 10^9/L
20-30 x 109 /L
What solution can be used as a diluting fluid for WBC counting?
Acetic acid, Turk's fluid
Normal saline
Distilled water
Glycerol
Formalin
What is the gentian violet for WBC counting?
Stain the nuclei of the WBC
Measure the size of the WBC
Count the number of RBC
Detect the presence of platelets
What is the dilution factor if blood is aspirated to the 0.5 mark and the diluting fluid is aspirated until the 11th mark?
20
10
5
50
What is the dilution factor if blood is aspirated to the 1 mark and the diluting fluid is aspirated until the 11th mark?
10
5
20
100
What is the dilution factor if blood is aspirated to the 0.5 mark and the diluting fluid is aspirated until the 101th mark?
200
100
50
20
What is the dilution factor if blood is aspirated to the 1 mark and the diluting fluid is aspirated until the 101th mark?
100
10
50
101
How many drops of the mixture in the WBC thoma pipette is discarded before charging the hemocytometer?
2 drops
1 drop
3 drops
4 drops
The formula used to compute for WBC estimate when WBC is counted in 10 fields is:
Average number of WBCs per field × 2,000
Total WBCs counted × 100
Average number of WBCs per field × 1,000
Total WBCs counted ÷ 10
In what objective do you count WBCs for WBC estimate?
Oil immersion objective
Low power objective
High power objective
Scanning objective
