NURSING EXAM QUESTIONS
TOXICOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The drugs location on the hair shaft becomes a historical marker for drug intake
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The drugs location on the scalp becomes a historical marker for drug intake
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The drugs location pieces of hair becomes a historical marker for drug intake
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Hair cannot be used to determine drug use
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Detailed explanation-1: -The deposition of drug in the hair depends on the concentration of drug in blood if the rate of hair growth is constant. This model describes that segmental analysis of hair can predict the presence of the drug in the blood for a specific time interval.
Detailed explanation-2: -Nuclear DNA analysis can be done on human hairs. The trace section assists the DNA section by screening hairs and determining their suitability for DNA testing. A microscope is used to examine the root end of the hairs, in order to determine if they are suitable.
Detailed explanation-3: -Drugs which are ingested circulate in the bloodstream which nourishes developing hair follicles. As a result, trace amounts of the target drug or drug metabolite are deposited in the hair follicle and become entrapped in the core of the hair shaft as it grows out from the hair follicle.