Lesson 6 - Clinical Chemistry Flashcards

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1
Q

True or false: Serum has no fibrinogen because it has been used up in the clotting process.

A

True

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2
Q

True or false: Plasma is formed if no anticoagulant is present.

A

False, a anticoagulant has to be present for plasma to form.

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3
Q

What does it mean to “decant” a liquid or serum?

A

To separate or pour off into another tube

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4
Q

Define analyte.

A

The component in serum being tested on

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5
Q

Define an assay.

A

The type of test being performed.

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6
Q

The liquid portion of blood collected in a tube that is allowed to clot is ____.
A serum
B plasma
C decant

A

A serum

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7
Q

The lab assistant must ____ the supernatant from the blood collection tube as soon as it clots.
A analyze
B decant
C centrifuge

A

B decant

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8
Q

What is the abbreviation of nanometers?

A

nm

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9
Q

Amplitude is the height or length of a wave?

A

height, which equals the intensity of light.

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10
Q

Frequency is the number or time of waves that pass a given point?

A

number

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11
Q

As/Au = Cs/Cu

A

A = Absorbance
C = Concentration
s = standard
u = unknown (patient sample)

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12
Q

What is a spectrophotometer used to find?

A

Absorption of unknown (patient) and known concentrations.

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13
Q

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

A

b. Analyte

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14
Q

When performing a test for electrolyte concentrations, the electrolytes are known as the __________.

a. Analyzer
b. Decantant
c. Analyte
d. Supernatant

A

a. Analyzer

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15
Q

The unit of measurement for a wavelength of light is __________.

a. Meter
b. Millimeter
c. Micrometer
d. Nanometer

A

d. Nanometer

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16
Q

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

A

d. Passed through

17
Q

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

A

c. Photodetector

18
Q

A nephelometer measures __________.

a. Fluorescence
b. Antibodies
c. Color
d. Turbidity

A

d. Turbidity

19
Q

Immunoassays depend on __________ to detect disease.

a. DNA amplification
b. Turbidity
c. Antigen-antibody reactions
d. Chemical reactions

A

c. Antigen-antibody reactions

20
Q

Beer’s Law is valid as long as the standard curve is __________.

a. Curved
b. Linear
c. Vertical
d. Horizontal

A

b. Linear

21
Q

Electrophoresis is a type of __________ test.

a. Flow cytometry
b. Nephelometry
c. Electrochemical
d. Immunoassay

A

c. Electrochemical

22
Q

__________ is the step in a PCR test when the DNA is unwound to be duplicated.

a. Unwinding
b. Amplification
c. Denaturation
d. Annealing

A

c. Denaturation