Normal Size Small Size show me how
Q&A CMA CH 10 Lab
Ch 10 Laboratory Procedures
|Pregnancy tests detect pregnancy by the presence in either urine or serum of
|human chorionic gonadotropin (hCG) hormone (hCG is produced by the placenta and therefore provides evidence of pregnancy).
|Confirmatory (alternative) testing is performed on samples to increase the medical assistant's confidence that the result of a test is correct. Which of the following is NOT a correct statement about confirmatory tests?
|confirmatory testing would not be done when the same results are normal
|A test to determine the ability of the kidneys to concentrate or dilute urine, according to the needs of the body, measures
|specific gravity (the average normal range of specific gravity is 1.010 to 1.025).
|In routine urinalysis, all of the following are physical properties of the urine EXCEPT
|sediment (color, appearance, specific gravity, odor, and turbitity are the characteristics of urine).
|The range of the volume of urine voided by an adult during a 24-hour period is
|Clinitest is a test to detect
|In performing a venipuncture, the medical assistant should not leave the tourniquet on the patient's arm, without releasing it, for longer than
|Due to excess lipids in the blood, turbid (lipemic) serum appears
|cloudy and milky
|If a blood sample is collected in a serum seperator gel tube, the medical assistant generally should allow a clot to form for what period of minute(s) before centrifuging?
|In quantative measurement of urobilinogen, the type of urine specimen required is a
|2 hour volume specimen
|The organ in the body responsible for the production of insulin is the
|the storage form of glucose in the liver is
|A glucose tolerance test (GTT) measures the response of the sudden intake of glucose. The highest blood glucose reading for a normal person during the GTT will occur
|30-60 minutes after the test starts
|The blood urea nitrogen (BUN) test is a blood test used to assess the function of the
|High plasma cholesterol levels may be associated with which of the following
|In structure form, cocci bacteria are found in which of the following shapes?
|Which procedure is inappropriate when performing venipunctures?
|release the tourniquet after withdrawing the needle
|When doing a differential white cell count, the normal range of eosinophils is
|A term indicating that a disease has become widespread in a population and has increased in territory is
|The invasion of the body by any pathogenic organism is called
|Which of the following diseases is a fungus?
|dermatophytosis (e.g., athlete's foot)
|The smallest of the microorganisms are the
|Cocci occuring in pairs are
|Cocci occurring in chains are
|Which federal regulation for the clinic laboratory specifies guidelines for quality control, quality assurance, adequate record keeping, and qualified personnel?
|Viruses differ from bacteria in that they have
|either DNA or RNA
|Which federal agency overseea the safety of health facilities including protection against occupational exposure to hepatitis B virus and human immunodeficiency virus?
|The term used to indicate that two or more organisms are living together is
|A term applied to bacteria that can adapt to an enviroment with or without oxygen is
|Diseases that occur when the body apparently fails to recognize its own constituents and begins to produce antibodies to fight them are called
|acquired immunodeficiency syndrome (AIDS)
|Direct contact, droplets, and fomites are ways which viruses are transmitted to cause
|Most rickettsial diseases are transmitted by
|insects and ticks
|The disease of Coccidioidomycosis is commonly called
|San Joaquin fever
|An example of a pathogenic fungus that a medical assistant may see in a physican's office is
|Which temperature scale is used in the medical laboratory because it has smaller units and is easier to calculate?
|centigrade or Celsius scale
|The test in microbiology or bacteriology that checks the susceptibility of an organism to specific antibiotics is the
|The Mantoux test is used to screen for pathogenic acid-fast organism, which causes
|pneumonia and hepatitis
|A persistent viral infection in which the symptoms come and go is called a/an
|Which of the followingis considered to be a CORRECT safety rule in the medical laboratory?
|hands should be washed frequently and thoroughly
|The stain most used to identify and study bacteria is the
|Glucose meters are used in a physician's office laboratory and the home to monitor blood glucose levels. Which of the following equipment would NOT be necessary to perform a blood glucose meter?
|The normal range for a prothrombin time test is
|Which of the following radiographs (x-ray exams) would produce numerous cross-sectional images of a body part?
|the CAT scan also known as computed tomography
|The procedure that provides an image of a developing fetus thereby reveals the sex is
|A contrast media often used in radiographic diagnostic procedures of the gastric tract is
|The "chain of custody" referred to in drug testing in the work place is
|a pre-employment drug screen program
|Which of the following diagnostic radiology machines does not use x-ray or ionizing radiation of any kind?
|magnetic resonance imaging
|Which of the following statements about occult (hidden) blood in urine is FALSE?
|if the urine sediment turns the regent test strip block white, the test is positive for occult blood
|The presence of numerous leukocytes in the urine during microscopic examination is referred to as
|On the N-Multistix 10 SG, most tests can be read
|In less than two minutes
|In a reagent dipstick test for ketone bodies in the urine, the largest amounts are represented by an intensified
|If a urine specimen is to be sent to a laboratory for a bacteriologic culture, a female patient should be instructed to
|collect a specimen midstream in a sterile bottle
|The best urine sample to use for pregnancy test is a
|first morning specimen
|Ictotest is a tablet used to diagnose
|Epithelial cells are reported as
|The number per high-power field
|An Addis count is done to determine
|a patient's urinary output of formed elements for 12 hours
|A wound culture would be obtained to identify which of the following?
|any of the above (strep bacteria, staph bacteria, Gram-negative organisms, or other pathogens
|X-rays may be potentially dangerous to employees in a physician's office where they are taken because
|the effect of radiation is cumulative
|The most effective way of being certain that indidviuals employed in a pysician's office are not receiving dangerous amounts of radiation is to
|subscribe to a film badge service
|Specimens colleceted for drug or alcohol analysis should be accompanied by
|all of the above (purpose of test, collector's name, site of collection/date/time, pertinent comments about specimen)
|The direct roentgen (x-ray) beam comes from the
|Secondary radiation is
|emitted by the patient being filmed
|Which of the following is not used in collecting sputum for cultures?
|A radiograph is a/an
|permanent record of an x-ray image
|A patient is scheduled for a retrograde pyelogram. The contrast medium will be administered
|A patient has been scheduled for an intravenous pyleogram (IVP) on a Tuesday morning. The medical assistant's instructions to the patient about diet for the preceding evening should be to eat
|a light meal with nothing after 9:00pm
|A patient has been scheduled for a cholecystogram. This is an examination of the
|A patient who is having an upper gastrointestinal (GI) series will
|drink a suspension of barium sulfate
|The system of scientific measurement used in medical laboratories is the
|Which of the following is not a compnent of blood?
|When a patient is placed in an AP (anteroposterior) position for radiography, the
|anterior (front of the body) is facing the tube
|The fragments of blood smears or in blood dilutions in order to predict the body's ability to clot are
|Which of the following tests would not be performed on an automated hematology instrument?
|Ivy (template) bleeding time
|When you perform a chemical urinalysis test using a reagent strip, which one of the following tests would you expect to read positive?
|A blood cell that is very large with a nucleus that may be oval, indented, or horseshoe-shaped is a/an
|In a differential smear, platelets appear as very small azure-blue bodies when stained with
|RBC pipettes are made so that if blood is drawn tp the 0.5 mark and diluted to the 101 mark, the dilution will be
|A hemocytometer is counting chamber used to count cells microscopically. The total area on one side of the hemocytometer is
|If you performed a white blood cell count using a hemocytometer and the average cell count was 120, the dilution was 1:20, and the area counted was 4 mm^2, what would be reported as the answer?
|The normal WBCs per cubic millimeter for both men and women is
|Automated blood cell counters are now commonly used not only in hospitals but also in physicians' offices. Which one of the following statements about automated instruments is FALSE?
|they count fewer numbers of cells
|A fibrometer is an automated analyzer that is used to perform
|coagulation determinations using clot formation
|The normal RBC count for men, reported as millions of cells per cubic millimeter, is
|A complete blood cell count (CBC) consists of all of the following when capillary blood is used EXCEPT
|erythrocyte sedimentation rate (sed rate)
|On long standing, urine becomes
|Usually the most concentrated urine (greatest specific gravity) is voided
|first thing in the morning
|A 2-hour postpradial urine specimen is commonly ordered by the physician when he or she is particularly interested in knowing the results for
|If a urine specimen is not collected properly, blood might be found as a contaminant in the specimen of
|women who are menstruating
|Normal urine has a PH range of
|The normal specific gravity of urine usually ranges between
|The weight of a given volume of a substance divided by the weight of the same volume of water is the formula for
|For the highest possible magnification, the 100X oil immersion lens is used with an eyepiece (ocular) that gives a magnification of 10X. This allows the medical assistant to see an object
|1,000 time its actual size
|Which of the following procedures represents proper handling or care of the microscope?
|clean all excess oil from the oil immersion objective with lens paper
|When a microscopic slide is to be examined, the field is found by
|lowering the lower power objective using the course adjustment
|For microscopic examination, slides are placed on the
|The Centers for Disease Control and Prevention (CDC) issued recommendations known as Universal Precautions for the prevention of such diseases as
|AIDS and hepatitis
|From what are of the respiratory tract should sputum be collected
|For examination of a stool specimen for occult blood, the specimen
|need not be kept warm or examined immediately
|Papanicolaou smears are specimens of cells which are analyzed to detect
|cancer of the cervix
|Normal bleeding time using Duke's method is
|In making a fincure puncture, a medical assistant should be careful to avoid
|squeezing the puncture to encourage bleeding
|An example of Gram-negative organism is
|An example of Gram- positive organism is
|A glucometer is designed to give readings of
|blood glucose values
|Expressed in terms of mm/hour, the normal range of Westergren erythrocyte sedimentation rate (ESR) for men older than 50 is
|The average range of hemoglobin values for women, expressed as g/100 mL, is
|In a differential white blood count cell count, basophils and eosinophils may average
|less than 5%
|In a differential white blood cell counts of adults, lymphocytes may average
|In a normal differential WBC count, neutrophils average approximately
|The normal hemocratic reading for men is approximately
|Which of the following may result in accidental needle sticks to the medical assistant?
|careful recap needles before disposal
|One of the recommended AIDS-related precautions for medical assistant is to disinfect work surfaces and equipment with
|sodium hypochlorite (household bleach)
|The(CDC) has developed guidelines recognizing the infectious potential of any patient specimen. Which of the following guidelines provides the single greatest protection against AIDS and other bloodborne pathogens?
|isolate each biological specimen from the worker
|A quality control program in a laboratory ensures the reliability of the tests and their results. Which of the following would cause errors in a quality control program?
|the quality control program should be posted weekly
|Levy-Jennings charts are used in the laboratory to make easy comparisons of tests controls in order to have better
|may be seperated from the blood cells by centrifugation
|is always collected in green-top tubes
|When performing a venipuncture,
|all tubes containing an anticoagulant or preservative should be allowed to fill to exhaustionof the vacuum
|To inform and prepare a patient for a fasting glucose determination,the medical assistant should instruct the patient to
|fast 8-12 hours
|To perform a venipuncture, the medical assistant should
|All of the above (swab the site with alcohol, stand in front of the patient, penetrate the skin about 1/4 inch below the point where the vein will be entered, and enter the skin and vein with the needle at a 15-degree angle
|The medical assistant who prepares blood smears
|keep the spreader slide at a 35- to 40-degree angle, place one-half of a drop about 1/2 to 3/4 inch from end of the slide, bring spreader slide back into the drop to start the smear
|Which of the following factors must be included when calculating a blood cell count that has performed using the Unopette and hemocytometer?
|number of cells counted, the area counted, dilution factor, and depth of the fluid on th hemacytometer
|Which of the following blood parameters is performed with a colorimeter within an automatic blood cell counter
|white cell differential
|Pycisians often order a clinical laboratory panel or profile on a patient when they are checking a particular body organ or system. which of the following is NOT a common profile study ordered by the physician?
|Which venipuncture type is preferred to obtain blood from patients who are hard to stick?
|the butterfly method
|The reagant strip method for occult blood in urine is measuring amounts of
|intact red blood cells and free hemoglobin
|The part(s) of the microscope resonsible for regulating the light that strikes the object are the
|condenser and iris diaphram
|Agglutination test kits used to detect the presence of heterophil antibodies that are found in plasma or serum of patients with infectious mononucleosis (IM) contain the following
|slides, reagents, positive control, and negative control.
|Which of the following tests are used to diagnose the disease syphilis?
|To determine the specific gravity of a urine sample in a pysician's office, a medical assistant might use which of the following?
|The falling drop method
|A good blood cell differential smear includes which of the following?
|making a feathered edge
|Which of the following written instructions will NOT be given to patients for 24-hour urine collections?
|add one-fourth of a cup of bleach to the container as a preservative
|Which instruction to a female patient for a clean-catch specimen is correct.
|collect a first urine
|The following criteria must be met to obtain reliable pregnancy tets results EXCEPT
|at least 60 days must have passed since the beginning of the patient's last menstrual period for a positive result
|If a urine sample is permitted to stand for a period longer than 1 hour at room temperature without a preservative, which of the following will NOT occur?
|glucose levels may increase
|The diagnostic ultrasound uses vary high frequentcy inaudible sound waves that bounce off the body to record information on the structure of internal organs. The record produced is called a/an
|sonogram or echogram
|Which of the following laboratory tests indicates the need for immediate action (an action value)?
|high protein level in a urine specimen