SLEEP Flashcards
the most common altered state people experience is the one they spend about a third of their lives in on a nightly basis
sleep
once referred to as “the gentle tyrant”
Sleep
one of the human body’s biological rhythms, natural cycles of activity that the body must go through.
Sleep
circadian rhythm
sleep–wake cycle
cycle that takes “about a day” to complete.
circadian rhythm
comes from two Latin words, circa (“about”) and diem (“day”)
circadian rhythm
controlled the sleep-wake cycle
brain (hypothalamus)
the tiny section of the brain that influences the glandular system
hypothalamus
a hormone normally secreted by the pineal gland
melatonin
the internal clock that tells people when to wake up and when to fall asleep
suprachiasmatic nucleus or SCN
is influenced the secretion of melatonin by a structure deep within the tiny hypothalamus
suprachiasmatic nucleus
or SCN
secrete melatonin, located in the base of the brain
pineal gland
sensitive to changes in light
daylight fades, the ____ tells the pineal gland to secrete melatonin
SCN or Suprachiasmatic nucleus
used to treat a condition called jet lag
melatonin supplements
body’s circadian rhythm has been disrupted by traveling to another time zone
jet lag