Which Device Would a Sleep Researcher Use to Monitor a Sleeping

question 139

Multiple Choice

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

• A) electromyograph (EMG)
• B) electrocardiograph (EKG)
• C) electro-oculograph (EOG)
• D) electroencephalograph (EEG)

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Definitions:

Chiral

Describes an object, typically a molecule, that cannot be superimposed on its mirror image, illustrating handedness in its structure.

Optically Active

A substance is said to be optically active if it can rotate the plane of polarization of polarized light, a property often associated with the presence of chiral molecules.

Chiral

Describes a molecule or ion that cannot be superimposed on its mirror image, often resulting in two forms (enantiomers) with different properties.

Enantiomer

One of two stereoisomers that are mirror images of each other but not superimposable, often showing different behaviors in chiral environments.