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Flashcards in quizzes first half Deck (66):
1

____ can be used to remove excess oil but can also dissolve the adhesives to secure the objective lenses.

Xylene

2

A technician needs to take a 60 mg/dL solution and dilute it 1:5. What would be the concentration of the dilution?

60 divided by 5 = 12 mg/dL

3

A technician needs to take a 40-mg/dL sample and dilute it 1:10. What would be the concentration of the dilution?

40 divided by 10 = 4 mg/dL

4

Change 73 degrees Faheinheit to celcius?

22.8 degrees Celcius 73-32 divided by 1.8

5

A test result comes back with a value of 45.6 x 10 to the -2 power. How would you write this as a correctly rounded standard decimal number?

0.46

6

Quality control programs ensure the accuracy of laboratory results. Which term is defined by the magnitude of random errors and the reproducibility of measurements?

precision

7

What tests does the refractometer do?

specific gravity for urine and total protein for blood

8

An object is being viewed with a light compounding microscope that has an ocular lens with 10x magnification and the 100x objective . What is the magnification of the object?

1000x

9

Which style of centrifuge has drilled hoes that hold test tubes and run at high speeds without causing excessive heat buildup that could damage the specimen?

angle arm centrifuge

10

What type of microscope is an essential piece of laboratory equipment for a hospital laboratory

light compound microscope

11

Specific protocols within a vet. hospital that mandate the correct use of hazardous chemicals are categorized as what type of controls?

administrative

12

What documents provided by manufacturers of all hazardous materials must be readily available to employees at every vet. facility?

material data sheets

13

An image is viewed through the microscope in which of the following ways?

upside down and reversed

14

When using the metric system, the prefix milli- refers to which power of 10?

10 ¯³

15

Which term refers to the condensing of the nucleus as the cell dies?

pyknosis

16

When quantifying morphologic changes in red blood cells, a designation of 3+ would indicate approximately how many of the cells are affected by the morphologic change?

50%

17

10 to the 12th power

tera-

18

10⁹

giga-

19

10⁶

mega-

20

10³

kilo-

21

10²

hecto-

22

10¯²

centi-

23

10¯⁶

micro-

24

10¯⁹

nano-

25

10 to the -12 power

pico-

26

10 to the -15 power

femto-

27

10 to the -18 power

atto-

28

Smudge cell?

AKA - basket cells are degenerative leukocytes that have ruptured

29

Karyolysis?

a degenerative change to the nucleus that is characterized by the dissolution of the nuclear membrane

30

Karyorrhexis?

the fragmentation of the nucleus after cell death

31

Apoptosis?

the death of single cells by a process involving shrinkage, rapid fragmentation, and the engulfment of the fragments by neighboring cells and macrophages

32

A corrected reticulocyte count is calculated by?

Problem: a dog has a PCV of 15% and an observed reticulocyte count of 15% - the normal dog 45%

multiplying the observed reticulocyte percentage by the observed PCV divided by the normal PCV (normal dog - 45%) (normal cat 35%) i.e.

Answer is : 15 x 15 = 225 divided by 45 = 5
5% corrected reticulocyte count

33

pancytopenia?

a medical condition in which there is a reduction in the number of red and white blood cells, as well as platelets

34

neutropenia?

a decrease in neutrophil concentration.

35

thrombocytopenia?

the medical term for a low blood platelet count

36

The preferred anticoagulant for hematology studies is?

EDTA

37

The preferred anticoagulant for clinical chemistry's?

Heparin

38

A patient has severe flea infestation and shows signs of anemia. Which would be the best classification of anemia for this patient?

Hemorrhagic

39

Hemolytic anemias?

the result of erthrocyte destruction within the blood, and they are usually regenerative

40

Iron deficiency?

can be the result of a nutritionally deficient diet or from chronic blood loss

41

production disorders?

reduced rates of erythropoiesis or defective erythropoiesis generally result in a normocytic anemia

42

In evaluating a blood smear?

the counting area, where most of the evaluation takes place, is between the body and the feathered edge

43

Platelets in mammals?

do not have nuclei

44

Which type of sample of plasma can result in a false increases in the total protein reading?

lipemic sample

45

Rouleaux formation?

is normal in horses and often shows RBCs appearing liked stacked coins

46

What procedure must always accompany a complete blood count evaluation to determine the accuracy of the test?

morphological evaluation

47

This platelet histogram shows?

normal platelet results - upward line, then slight angle down to 1 1/2 above 10 angling down to the 20 and then continuing to 27 along the bottom line

48

This platelet histogram shows?

up, then down, with a slight upward line, then angled down to 1 1/2 inches from bottom above about 15 and slowly comes down with small rolling bumps to the 45 maybe touching bottom line

49

High reticulocytes counts of more than 60,000/mL in dogs and more than 50,000/mL incats are compatible with?

regenerative anemia

50

Manual cell counts are rarely performed except in which of the following animals?

bird

51

Which type of WBC is not commonly seen on the blood film?

basophil

52

Which of he erythrocyte indices is reported in grams per deciliter?

MCHC

53

Which abnormality in erythrocytes is caused by insufficient hemoglobin in the cell?

hypochromasia

54

An anucleated immature RBC seen in the peripheral blood of some mammals is a?

reticulocyte

55

Which type of stain is est used to prepare a reticulocyte count smear?

Supravital

56

anisocytosis is?

variation in cell size

57

poikilocyte?

abnormally shaped cell

58

Which abnormality is characterized by the appearance of clumping of erythrocytes (which does not go away in saline) and may be observed both macroscopically and microscpically? If it does go away in saline, it is called?

Autoagglutination

Rouleaux

59

A technician need to calculate the absolute value of neutrophils on a blood smear. The neutrophil percentage onthe relative white blood cell count is 78%, and hte total wBC count is 6,000/uL. What is this absolute value for this patient?

78 x 6000 = 4680 uL

60

Reticulocyte count?

- add several drops of mew methylene blue to several drops of EDTAanticoagulated blood in small test tube
- incubate for 10 min. at room temp
- make a conventional blood smear - air dry
- count a total of 1000 RBCs as reticulocytes which contain clumps of dark-staining aggregated organelles
- calculate the percentage of reticulocytes by dividing the number of reticulocytes counted in previous step by 1000. A corrected reticulocyte percentage can be determined if the RBC is not available.

CRP = % reticulocytes x patient's PCV divided by 45 (dog) or 37 (cat)

61

Correct WBC count?

The correct WBC count = total nucleated cell count x 100 divided by nRBCs + 100

62

The cells on a blood smear appear as small fragmented sections of erythrocytes. What is the term used for this abormality?

schistocytes

63

Whole blood is composed of fluid and cells. What is the fluid component of whole blood?

plasma

64

What is the medical term for this clinical sign of coagulopathy?

epistaxis? - nose bleed

65

What is the full name of this test?

Bucca mucosa bleeding time

66

What is the medical term for a decrease in the amount of platelets circulating in peripheral blood?

thrombocytopenia