Jan Has Used Crack to the Point Where She Has

question 145

Multiple Choice

Jan has used crack to the point where she has impaired control over her use of it.While she experiences no withdrawal symptoms when she stops using it, she wants it so badly she cannot stop herself from taking it.What does Jan's reliance on crack illustrate?

• A)substance use
• B)psychological dependence
• C)physiological dependence
• D)tolerance

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Definitions:

MS Peak

Refers to a peak observed in a mass spectrum, representing a particular ion's mass-to-charge ratio.

M+2 Peak

A term used in mass spectrometry to describe the peak that appears two mass units above the molecular ion peak, often indicating the presence of elements like chlorine or bromine.

Molecular Formula

A representation of the number and type of atoms present in a molecule, showing the exact composition of a molecule but not its structure.

M/Z Values

In mass spectrometry, a ratio of the mass to the charge number of ions, used to identify and quantify substances in a sample.