| 41. | The first pair are small protein hormones, secreted by the pineal gland and posterior pituitary gland respectively.
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| 42. | The pineal gland in the brain produces melatonin when our eyes register darkness, and tells us it's bedtime.
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| 43. | As he is about to eat her brain, she bites off his pineal gland, reverting him to his senses.
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| 44. | Signals travel from the master clock to the pineal gland and other centers that release hormones throughout the body.
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| 45. | Blue light, emitting at wavelengths of 400 500 nanometers, suppresses the production of melatonin produced by the pineal gland.
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| 46. | :: The pineal gland is historically a third eye, and was active as a light sensor in early fish.
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| 47. | Melatonin is produced only at night by the pineal gland, a pea-size organ in the center of the brain.
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| 48. | The association says one possible cause is melatonin, a sleep-related hormone secreted by the pineal gland in the brain.
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| 49. | The miracle stuff I bought is melatonin, a naturally occurring hormone secreted by the pineal gland, a tiny mid-brain structure.
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| 50. | See pineal gland for a homologous organ in vertebrates . talk ) 23 : 09, 14 September 2012 ( UTC)
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