Which of the Following Is True of Sleep

question 107

Multiple Choice

Which of the following is true of sleep?

• A)Most of the night is spent in the deepest level of sleep (stage 4).
• B)One spends an hour or two at each stage in turn, spending the last few hours at stage 4 and then at REM.
• C)One passes through all stages of sleep, including REM, several times in a normal night.
• D)One cycles in and out of various stages throughout the night instead of staying in one stage all night.

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Definitions:

Geminal

Referring to atoms or groups that are attached to the same carbon atom within a molecule.

Ultrapure Dimethylamine

A highly purified form of dimethylamine, which is an organic compound used in the synthesis of a wide range of chemicals.

Proton Spectrum

The range of frequencies or energies that protons exhibit in nuclear magnetic resonance (NMR) spectroscopy, revealing molecular structure.

Carbon-Carbon Splitting

A chemical process that involves breaking the bond between two carbon atoms in a compound.