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27問 • 1年前

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What is the S.I, unit for length? a.Millimeter b. Centimeter c. Meter d. Kilometer

c. Meter

The SI recommended unit for enzyme activity is KATAL, which is expressed as: a. Moles per liter per second b. pmol of substrate per minute per liter c. Moles per liter per minutes d. pmol of substrate per second per liter

a. Moles per liter per second

Conversion factor for thyroxine from pg/dL to nmol/L (SI): a, 0.026 b. 0.357 c. 10 d. 12.9

d. 12.9

The reproducibility of measurements is referred to as: a. Accuracy b. Precision c. Quality control d. Reliability

b. Precision

The ability of analytical method to measure the Smallest concentration of the analyte of interest: a. Accuracy b. Precision c. Sensitivity d. Specificity

c. Sensitivity

The ability of an analytical method to measure only the analyte of interest: a. Accuracy b. Precision c. Sensitivity d. Specificity

d. Specificity

The ability of a test to detect a given disease or condition: a. Diagnostic.specificit b. Diagnostic sensitivity c. Positive predictive value d. Negative predictive value

b. Diagnostic sensitivity

The middle value pfa set of numbers that are arranged according to their magnitude is known as the: a. Arithmetic mean b. Geometric mean c. Median d. Mode

c. Median

Which combination best describes a Gaussian (normal) distribution? a. Median > mode b. Mean=median=mode c. Median > mean d. Mode > mean

b. Mean=median=mode

In a Gaussian distribution, the + 2SD range includes the following percentage of values: a. 31.6% b. 68.3% c. 95.5% d. 99.7 %

c. 95.5%

The constant Systematic error can be determined by the: a. slope b. y-itercept c. Standard error of the estimate (Sy/x) d. Slope and y-intercept

b. y-itercept

a new reference interval is established when there is no existing analyte or methodology in the clinical or reference laboratory with which to conduct comparative studies. It is a costly and labor-intensive study that will involve laboratory resources at all levels and may require__ individuals. a. 10 b. 20 c. 100 d. 120

d. 120

Material with physical and chemical properties closely resembling the test specimen and containing preanalyzed concentrations of the substances being measured is known as a: a. Standard b. Control c. Reference solution d. Calibrator

b. Control

A material of known composition available in a highly purified form is a: a. Standard b. Control c. Technical reagent d. Test analyte

a. Standard

Chemicals that are used to manufacture drugs: a. Technical or commercial grade b. Analytical grade c. Ultrapure grade d. USP and NF chemical grade

d. USP and NF chemical grade

Calculate the coefficient of variation for a set of data where mean (x) = 89 mg/dL and 2 standard deviation = 14 mg/dL.c a. 7.8 b. 7.9 c. 12.7 d.15.7

b. 7.9

It is used to determine whether there is statistically significant difference between the means of two groups of data: a. t test b. f test c. Mode d.-Mean

a. t test

X-axis: a. Horizontal, dependent variables b. Horizontal, independent variables c. Vertical, dependent variables d. Vertical, independent variables

b. Horizontal, independent variables

Trend: a. Formed by control values that either increase or decrease for six consecutive days b. Formed by control values that distribute themselves on one side or either side of the mean for six consecutive days c. Main cause is improper calibration of instrument d. Control values that are far from the main set of values

a. Formed by control values that either increase or decrease for six consecutive days

A delta check: a. Relates control difference from mean b. Reports patient value difference from previous analysis c. Evaluates statistical drift d. Flags abnormal results

b. Reports patient value difference from previous analysis

All of the following statements refer to INTRALAB (INTERNAL) quality control, except: a. It involves analyses of control samples together with patient specimens b. it is important for the daily monitoring of accuracy and precision in analytical methods c. Detects both random and systematic errors d. Proficiency testing programs to participating laboratories

d. Proficiency testing programs to participating laboratories

a. A=abc b. 2-log%T c. Cu= Au x Cs d. All of these

d. All of these

A monochromator is a device that: a. Measures the intensity of light energy falling on a detector b. Determines the critical angle of refraction of dispersed light c. Disperses polychromatic light into its separate wavelengths d. Measures the intensity of light which falls on diffraction gratings

c. Disperses polychromatic light into its separate wavelengths

a. Barrier layer cell b. Photodiode c. Diode array d.Photomultipliertube

d.Photomultipliertube

All of the following statements about fluorometry except: a. Fluorometry is more sensitive that spectrophotometry b. Both excitation and emission spectra are characteristic of the analyte c. Fluorescence is directly proportional to temperature d. Unsaturated cyclic.molecules are often fluorescent

c. Fluorescence is directly proportional to temperature

Strobe light is used to calibrate: ; a. Spectrophotometer b. Centrifuge c. Refrigerator d. Water bath

b. Centrifuge

In , liquids (reagents, diluents, and samples) are pumped through a system of continuous tubing. Samples are introduced in a sequential manner, following each other through the same network. A series of air bubbles at regular intervals serve as separating and cleaning media. a. Automatic clinical analysis b. Continuous flow analysis c. Centrifugal analysis d. Discrete analysis

b. Continuous flow analysis

other names parasitology

Yves Laure Pimentel · 70問 · 2年前

other names parasitology