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(CD)·E and C·(DE) are equal.
Circadian Rhythms
Natural, internal processes that regulate the sleep-wake cycle and repeat roughly every 24 hours.
Melatonin
A hormone produced by the pineal gland that regulates sleep-wake cycles.
Cortisol
A steroid hormone released by the adrenal glands in response to stress or low blood-glucose concentration; plays a significant role in the body's response to stress.
Erythropoietin
A hormone produced by the kidneys that stimulates the production of red blood cells in the bone marrow.
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