A Positive Control Is Added (Spiked) into a Test Specimen

question 14

Multiple Choice

A positive control is added (spiked) into a test specimen. The test results of the specimen alone and the spiked mixture are negative. What does this most likely indicate?

• A) The specimen is negative.
• B) The specimen is positive.
• C) The specimen contains an inhibitor.
• D) The positive control contains an inhibitor.

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Definitions:

Prefrontal Cortex

The front part of the frontal lobe of the brain, important for decision-making, problem-solving, control of behavior and emotions, and complex cognitive behavior.

PGO Activity

Stands for Ponto-Geniculo-Occipital waves, which are associated with REM sleep and are thought to play a role in dreaming and learning.

Activation-Synthesis

A theory suggesting that dreams are the result of the brain's attempt to make sense of neural activity during sleep.

Occipital Cortex

The visual processing center of the mammalian brain containing most of the anatomical region of the visual cortex.