Lesson 6 - Clinical Chemistry Flashcards
True or false: Serum has no fibrinogen because it has been used up in the clotting process.
True
True or false: Plasma is formed if no anticoagulant is present.
False, a anticoagulant has to be present for plasma to form.
What does it mean to “decant” a liquid or serum?
To separate or pour off into another tube
Define analyte.
The component in serum being tested on
Define an assay.
The type of test being performed.
The liquid portion of blood collected in a tube that is allowed to clot is ____.
A serum
B plasma
C decant
A serum
The lab assistant must ____ the supernatant from the blood collection tube as soon as it clots.
A analyze
B decant
C centrifuge
B decant
What is the abbreviation of nanometers?
nm
Amplitude is the height or length of a wave?
height, which equals the intensity of light.
Frequency is the number or time of waves that pass a given point?
number
As/Au = Cs/Cu
A = Absorbance
C = Concentration
s = standard
u = unknown (patient sample)
What is a spectrophotometer used to find?
Absorption of unknown (patient) and known concentrations.
A(n) __________ is the machine used in clinical chemistry to detect and measure chemicals in blood and body fluids.
a. Centrifuge
b. Analyte
c. LIS
d. Analyzer
b. Analyte
When performing a test for electrolyte concentrations, the electrolytes are known as the __________.
a. Analyzer
b. Decantant
c. Analyte
d. Supernatant
a. Analyzer
The unit of measurement for a wavelength of light is __________.
a. Meter
b. Millimeter
c. Micrometer
d. Nanometer
d. Nanometer
A spectrophotometer is an instrument that measures the intensity of light that is __________ a solution.
a. Scattered by
b. Emitted by
c. Reflected by
d. Passed through
d. Passed through
The __________ in the spectrophotometer converts radiant energy into an equivalent amount of electrical energy.
a. Light source
b. Readout device
c. Photodetector
d. Wavelength sector
c. Photodetector
A nephelometer measures __________.
a. Fluorescence
b. Antibodies
c. Color
d. Turbidity
d. Turbidity
Immunoassays depend on __________ to detect disease.
a. DNA amplification
b. Turbidity
c. Antigen-antibody reactions
d. Chemical reactions
c. Antigen-antibody reactions
Beer’s Law is valid as long as the standard curve is __________.
a. Curved
b. Linear
c. Vertical
d. Horizontal
b. Linear
Electrophoresis is a type of __________ test.
a. Flow cytometry
b. Nephelometry
c. Electrochemical
d. Immunoassay
c. Electrochemical
__________ is the step in a PCR test when the DNA is unwound to be duplicated.
a. Unwinding
b. Amplification
c. Denaturation
d. Annealing
c. Denaturation
