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Lab Equipment and Measurement

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Questions and Answers

What is the formula to calculate LDL cholesterol?

Total cholesterol - (HDL cholesterol + TRIG/10)
Total cholesterol - (HDL cholesterol + TRIG/2)
Total cholesterol - (HDL cholesterol + TRIG/3)
Total cholesterol - (HDL cholesterol + TRIG/5) (correct)

What is the next step in calculating LDL cholesterol after calculating TRIG/5?

Add HDL cholesterol to TRIG/5 (correct)
Add TRIG/5 to HDL cholesterol
Subtract HDL cholesterol from TRIG/5
Subtract TRIG/5 from HDL cholesterol

What is the result of the LDL cholesterol calculation in the example given?

112 mg/dL (correct)
225 mg/dL
113 mg/dL
190 mg/dL

What is the condition under which the LDL calculation should not be performed?

If triglycerides are > 400 mg/dL (D) Signup and view all the answers

What is the relationship between the concentration of a substance and the amount of radiant energy absorbed according to Beer's Law?

Directly proportional (C) Signup and view all the answers

What is the formula represented by the equation A = -2 - log %T?

Beer's Law (B) Signup and view all the answers

What is the concentration of the unknown in the example given, using Beer's Law?

5.25 g (B) Signup and view all the answers

What is the purpose of a chain of custody form?

To document the procurement and analysis of a specimen (D) Signup and view all the answers

When is a chain of custody form required?

For any specimen used as legal evidence in court (B) Signup and view all the answers

What is the term for the chronological documentation of the procurement, custody, control, transfer, analysis, and disposition of a specimen?

Chain of Custody (C) Signup and view all the answers

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