Flashcards in quizzes first half Deck (66):
____ can be used to remove excess oil but can also dissolve the adhesives to secure the objective lenses.
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
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
Change 73 degrees Faheinheit to celcius?
22.8 degrees Celcius 73-32 divided by 1.8
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?
Quality control programs ensure the accuracy of laboratory results. Which term is defined by the magnitude of random errors and the reproducibility of measurements?
What tests does the refractometer do?
specific gravity for urine and total protein for blood
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?
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
What type of microscope is an essential piece of laboratory equipment for a hospital laboratory
light compound microscope
Specific protocols within a vet. hospital that mandate the correct use of hazardous chemicals are categorized as what type of controls?
What documents provided by manufacturers of all hazardous materials must be readily available to employees at every vet. facility?
material data sheets
An image is viewed through the microscope in which of the following ways?
upside down and reversed
When using the metric system, the prefix milli- refers to which power of 10?
Which term refers to the condensing of the nucleus as the cell dies?
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?
10 to the 12th power
10 to the -12 power
10 to the -15 power
10 to the -18 power
AKA - basket cells are degenerative leukocytes that have ruptured
a degenerative change to the nucleus that is characterized by the dissolution of the nuclear membrane
the fragmentation of the nucleus after cell death
the death of single cells by a process involving shrinkage, rapid fragmentation, and the engulfment of the fragments by neighboring cells and macrophages
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
a medical condition in which there is a reduction in the number of red and white blood cells, as well as platelets
a decrease in neutrophil concentration.
the medical term for a low blood platelet count
The preferred anticoagulant for hematology studies is?
The preferred anticoagulant for clinical chemistry's?
A patient has severe flea infestation and shows signs of anemia. Which would be the best classification of anemia for this patient?
the result of erthrocyte destruction within the blood, and they are usually regenerative
can be the result of a nutritionally deficient diet or from chronic blood loss
reduced rates of erythropoiesis or defective erythropoiesis generally result in a normocytic anemia
In evaluating a blood smear?
the counting area, where most of the evaluation takes place, is between the body and the feathered edge
Platelets in mammals?
do not have nuclei
Which type of sample of plasma can result in a false increases in the total protein reading?
is normal in horses and often shows RBCs appearing liked stacked coins
What procedure must always accompany a complete blood count evaluation to determine the accuracy of the test?
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
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
High reticulocytes counts of more than 60,000/mL in dogs and more than 50,000/mL incats are compatible with?
Manual cell counts are rarely performed except in which of the following animals?
Which type of WBC is not commonly seen on the blood film?
Which of he erythrocyte indices is reported in grams per deciliter?
Which abnormality in erythrocytes is caused by insufficient hemoglobin in the cell?
An anucleated immature RBC seen in the peripheral blood of some mammals is a?
Which type of stain is est used to prepare a reticulocyte count smear?
variation in cell size
abnormally shaped cell
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?
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
- 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)
Correct WBC count?
The correct WBC count = total nucleated cell count x 100 divided by nRBCs + 100
The cells on a blood smear appear as small fragmented sections of erythrocytes. What is the term used for this abormality?
Whole blood is composed of fluid and cells. What is the fluid component of whole blood?
What is the medical term for this clinical sign of coagulopathy?
epistaxis? - nose bleed
What is the full name of this test?
Bucca mucosa bleeding time