Biological Rhythms: circadian rhythms Flashcards
circadian rhythms definition
biological rhythms, subject to a 24 hour cycle, which regulates a number of body processes such as sleep/wake cycle and changes in core body temperature
biological rhythms definition
distinct patterns of changes in body activity that conforms to cyclical time periods. biological rhythms are influenced by internal body clocks (endogenous pacemakers) as well as external changes to the environment (exogenous zeitgebers)
who is subject to biological rhythms
all living organisms such as pants, animals and people
what do biological rhythms exert
an important influence on the way in which body systems behave
what are all biological rhythms determined by
-endogenous pacemakers
-exogenous zeitgebers
what are endogenous pacemakers
the body’s internal biological clocks
what are exogenous zeitgebers
external changes in the environment
are endogenous pacemakers internal or external
internal
are exogenous zeitgebers internal or external
external
what rhythms occur during the day
ultradian rhythms
what rhythms take longer than a day to complete
infradian rhythms
what rhythms take much longer than a day to complete
circannual rhythms
how long do circadian rhythms last
about 24 hours
2 examples of circannual rhythms
-sleep/wake cycle
-core body temperature
what does feeling drowsy at night and alert in the day demonstrate
the effect of daylight which is an exogenous zeitgeber on our sleep/wake cycle