circadian rhythms

Question 1

Circadian rhythm

Sleep-wake cycle + body clock

Answer 1

lasts 24 hours and is
Set based on keeping us in track with the outside world e.g use light as an input to do this (we get tired when it is dark) - this links to hormone production

(+) case study - michel Siffre

Question 2

ultradian rhythms

Answer 2

less than 24 hours e.g sleep cycle (deep sleep, light sleep)

repeats itself every 90 minutes

(-) individual differences affect sleep cycle e.g insomnia

Question 3

infradian rhythm

Answer 3

more than 24 hours

e.g menstrual cycle - monthly