0.14 Biological Rhythms
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8 Terms
what are biological rhythms
bodily cycles that occur over different amounts of time
what kind of biological rhythms are there
ultradian
more than a day (menstrual cycle)
circadian
around a day (sleep)
infradian
less than a day (REM)
in the sleep wake cycle what happens around 10pm
melatonin begins to be released
pituitary gland
pineal gland
releases melatonin
in the sleep wake cycle what happens around 4am-7am
stop production of melatonin
start releasing adrenaline to wake up
what are endogenous pacemakers
internal body clocks
help regulate biological rhythms
suprachiasmatic nuclei
what is the suprachaismatic nuclei
an endogenous pacemaker
centre of the brain
light info is taken in by the eyes
sends messages to SCN
SCN tells endocrine system - pituitary gland + then pineal gland to release melatonin if it is dark or adrenaline if it’s light
what exogenous zeitgebers
external cues
affect the regulation of endogenous pacemakers (light)
what can influence the SCN
exogenous zeitgebers
social cues (meal-times)
external temperatures
Note 
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