Examlex
Which of these statements is true of jihad ?
Suicide
The deliberate act of taking one's own life.
Melatonin Production
The process by which the pineal gland in the brain secretes melatonin, a hormone that regulates sleep-wake cycles.
Circadian Rhythms
Internal biological clocks that regulate various physiological processes and behaviors on approximately a 24-hour cycle, including the sleep-wake cycle.
Seasonal Affective Disorder
A type of depression that occurs at a specific time of year, usually during winter, when there is less natural sunlight.
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