"Cluster of Differentiation" Refers To

question 19

Multiple Choice

"Cluster of differentiation" refers to:

• A) a category of cell surface proteins used to identify cell types.
• B) aggregates of differentiating stem cells.
• C) groups of antigens that identify a cell as foreign.
• D) the cells that congregate in germinal centers.

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Definitions:

Slow-Wave Sleep

Slow-Wave Sleep refers to the deep sleep stage characterized by low frequency, high amplitude delta waves, important for memory consolidation and recovery.

REM Sleep

A phase of sleep characterized by rapid eye movement, during which vivid dreams commonly occur.

Hypnagogic Sensations

Experiences at the onset of sleep, including visual, auditory, or tactile hallucinations that occur in the transition from wakefulness to sleep.

Narcolepsy

An ongoing sleep problem marked by significant day time drowsiness and abrupt sleep onslaughts.