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MLPAO 291 Review Exam Practice
Questions with Answers and
Explanations
A standard electrocardiogram consists of:
a. 10 leads b. 12 leads c. 15 leads
d. Both b and c are correct - ✔ ✔ b. 12 leads Chest lead V2 is located:
a. Fifth intercostal space to the left margin of the sternum b. Fourth intercostal space to the right margin of the sternum c. Fifth intercostal space midclavicular line d. Fourth intercostal space to the left margin of the sternum - ✔ ✔ d. Fourth intercostal space to the left margin of the sternum
If artifact is present on the ECG recording, you should:
a. Run it again b. Check lead placement and run again
c. Correct the problem and run again d. None of the above - ✔ ✔ b. Check lead placement and run again Wandering baseline can be caused by:
a. Loose electrodes b. Body creams, oils, lotions c. An apprehensive patient d. A and b are correct - ✔ ✔ d. A and b are correct
The T wave represents:
a. The electrical activity associated with the contraction of the atria b. The electrical activity associated with the contraction of the ventricles c. The electrical recovery of the atria d. The electrical recovery of the ventricles - ✔ ✔ d. The electrical recovery of the ventricles What is the purpose of a holter monitor? a. To evaluate unexplained chest pain b. To assess effectiveness of an artificial pacemaker c. To assess the effectiveness of antidysrhythmic medications
V4 is located at the? - ✔ ✔ Fifth intercostal space at the junction of left midclavicular line V5 is located at the? - ✔ ✔ At the horizontal level of position 4 at the left anterior axillary line V6 is located at the? - ✔ ✔ Fifth intercostal space, midaxillary line. A profile is:
a. A general screening test b. A quantitative laboratory test c. A number of related laboratory tests
d. Dorsal view of the patient - ✔ ✔ c. A number of related laboratory tests A specimen is:
a. The removal of blood from the antecubital veins b. A small representative of body sample c. The surgical removal and examination of tissue
d. The clinical analysis of a urine sample - ✔ ✔ b. A small representative of body sample The purpose of cleansing the site selected for venipuncture is:
a. To cause the veins to be more prominent b. To allow blood flow to the area c. To decrease circulation in the arteries d. To carry microorganisms away from the puncture site - ✔ ✔ d. To carry microorganisms away from the puncture site A suction device used to draw up liquids is a (an)
a. Volumetric flask b. Beaker c. Erlenmeyer cylinder d. Graduated cylinder
e. Safety bulb - ✔ ✔ e. Safety bulb The pipette with a bulged out portion in the middle is a (an):
a. Mohr pipette b. Pasteur pipette c. serological pipette d. Volumetric pipette e. Micro-pipette - ✔ ✔ d. Volumetric pipette
Which piece of glassware would not give critical measurement?
a. sanitation b. antisepsis c. sterilization d. disinfection
e. asepesis - ✔ ✔ c. sterilization " ug " is a unit to describe:
a. time b. volume c. distance d. weight
e. length - ✔ ✔ d. weight A pH of 2 is _____ than a pH of 5:
a. 1000 times more acidic b. 100 times more acidic c. 2 times less acidic d. 20 times less acidic
e. 1000 times more acidic - ✔ ✔ e. 1000 times more acidic
Cells in a hypertonic solution will:
a. swell and burst b. dehydrate c. hemolyze d. not be affected e. stop mitosis - ✔ ✔ b. dehydrate
The solution used to fix a pap smear is:
a. wright stain b. hematoxylin c. physiological saline d. cytospray
e. methylene blue - ✔ ✔ d. cytospray Blood for an RBC count must be prepared from:
a. EDTA blood b. citrated blood c. heparinized blood d. oxalated blood
c. a post mortem examination d. excision of a representative tissue sample e. a collection of blood - ✔ ✔ d. excision of a representative tissue sample During tissue processing, what is the correct sequence of steps:
a. clearing, dehydration, infiltration b. clearing, infiltration, dehydration c. dehydration, infiltration, clearing d. dehydration, clearing, infiltration e. embedding, sectioning, staining - ✔ ✔ d. dehydration, clearing, infiltration Fixation is important in tissue processing because it:
a. prevents cell morphology changes and shrinkage b. allows tissue to be examined in a life-like condition c. facilitates the staining process d. a & c e. a, b, & c - ✔ ✔ e. a, b, & c
The liquid portion of blood remaining after a clot has formed is called:
a. the buffy coat b. serum c. plasma d. lymph
e. tissue fluid - ✔ ✔ b. serum Which test could not be performed on a serum sample:
a. iron b. vitamin B c. total lipids d. clotting factors
e. potassium - ✔ ✔ d. clotting factors The shape of a normal erythrocyte is described as:
a. biconcave disc b. spherocyte c. polymorphonucleocytes d. thin column
e. bull's eye - ✔ ✔ a. biconcave disc
d. the tourniquet is removed before withdrawing the needle e. the patients arm is cleansed before palpating the vein - ✔ ✔ e. the patients arm is cleansed before palpating the vein A biohazardous container is used to discard:
a. lancets b. needles c. band-aid wrappers d. a & b e. a, b & c - ✔ ✔ d. a & b
Which needle gauge corresponds with the smallest needle size:
a. 18 b. 20 c. 21 d. 22 e. 23 - ✔ ✔ e. 23
The vacutainer tube which is used to collect and separate serum is the:
a. red
b. green c. lavender d. light blue
e. SST - ✔ ✔ e. SST The tourniquet is:
a. applied very tightly to the arm b. used to increase venous fill c. applied about 6-8′′ above the elbow d. tied in a knot to keep it on securely e. released after the needle is withdrawn - ✔ ✔ b. used to increase venous fill If a patient faints during a venipuncture, you should:
a. call the physician at once b. remove the needle and attend to the patient c. yell loudly at the patient to keep him conscious d. continue the procedure until all blood is collected e. start artificial respiration immediately - ✔ ✔ b. remove the needle and attend to the patient What vein/veins is not used to obtain a venous blood sample:
a. erythrocyte sedimentation rate b. hematocrit c. reticulocyte count d. microhematocrit
e. differential - ✔ ✔ a. erythrocyte sedimentation rate Latex gloves protect the lab employee from:
a. accidental needle puncture b. microtome injury c. patient aerosols d. body fluids
e. all of the above - ✔ ✔ d. body fluids Which statement is false when setting up an ESR:
a. it must be read in exactly one hour b. it should be set up near a centrifuge c. the blood level must be at exactly zero d. it should be performed on fresh blood e. it must be set up in a vertical position - ✔ ✔ b. it should be set up near a centrifuge
What is the normal temperature of a laboratory refrigerator:
a. -4 C b. 0 C c. 3 C d. 20 C e. 37 C - ✔ ✔ c. 3 C
The purpose of doing a differential is to:
a. determine the proportion of RBC in whole blood b. count the number of WBC's in whole blood c. determine the proportions of WBC's in whole blood d. c & e
e. diagnose anemia - ✔ ✔ c. determine the proportions of WBC's in whole blood Blood samples for cell counts must be thoroughly mixed immediately before testing to:
a. prevent the clumping of platelets b. prevent the formation of small clots c. oxygenate the sample
a. remove any pathogens that are present b. increase blood flow to the area c. remove the last traces of alcohol d. remove any excess tissue fluid
e. c & d - ✔ ✔ e. c & d What areas on an infant are suitable for skin puncture:
a. any calloused areas of the foot b. the second or third finger on either hand c. the posterior curvature of the heel d. the lateral, flat portion of the heel - ✔ ✔ d. the lateral, flat portion of the heel What laboratory department studies antigen-antibody reaction?
a. hematology b. microbiology c. immunology d. chemistry e. coagulation - ✔ ✔ c. immunology
What tube would be drawn for ANA?
a. red b. grey c. SST d. green
e. light blue - ✔ ✔ c. SST A disinfectant used on metal surface is:
a. 10% formalin b. 2% glutaraldehyde c. 1% hypochlorite d. 70% isopropyl alcohol
e. 15% iodine - ✔ ✔ b. 2% glutaraldehyde What tube would be collected for a cross-match?
a. lavender b. light blue c. green d. grey e. plain red top - ✔ ✔ e. plain red top
Separated serum that is dark yellow to amber in color is termed:
