The Largest Lymphoid Organ

question 116

Multiple Choice

The largest lymphoid organ.

• A) tonsils
• B) lymph nodes
• C) aggregated lymphoid nodules
• D) thymus
• E) spleen

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Definitions:

Suprachiasmatic Nucleus (SCN)

A small region in the brain's hypothalamus responsible for controlling circadian rhythms through the regulation of sleep-wake cycles.

Melatonin

A hormone secreted by the pineal gland that regulates sleep patterns and circadian rhythms.

Pineal Gland

A small endocrine gland in the brain that produces melatonin, a hormone that regulates sleep-wake cycles.

25-Hour Day

A concept referring to the phenomenon where the internal body clock, or circadian rhythm, naturally leans towards a slightly longer cycle than the 24-hour day.