Biological rhythms Flashcards
1
Q
Biological rhythms
A
patterns of change in body activity, following cyclical time periods
2
Q
What are the 3 types of circadian rhythm
A
- circadian rhythm
- infradian rhythm
- ultradian rhythm
3
Q
Circadian
A
have a periodicity of one day/24 hours (occur over a day)
* e.g. sleep/wake cycle and body temperature
4
Q
Infradian rhythm
A
more than 24 hour periodicity- longer than a day
* e.g. menstural cycle, seasonal affective disorder and hibernation in bears
5
Q
Ultradian rhythm
A
less than one day/24 hours periodcity - occur many times during the day
* e.g. repeating the 4-6 cycles/stages of sleep at night
6
Q
what are biological rhythms dependent on
A
- endogenous pacemaker
- exogenous zeitgebers
7
Q
Endogenous pacemakers
A
the bodys internal clock
8
Q
Exogenous zeigebers
A
external changes in the environment
