Biological Rhythms

Question 1

Biological rhythms

Answer 1

Distinct patterns of changes in biological period which conform to cyclical time period

Question 2

Circadian rhythm

Answer 2

A cycle that lasts approx 24 hrs
Example: Sleep - wake cycle

Question 3

Ultradian rhythms

Answer 3

Multiple times in 24rs
E.G sleep cycle

Question 4

Infradian rhythms

Answer 4

Last longer than 24 hrs
E.G menstrual cycle

Question 5

Superchiasmatic nucleus

Answer 5

Moderates the internal body clock

Question 6

Exogenous Zeitgebers

Answer 6

External factors which alter a person’s biological Clock
Example: light

Question 7

Endogenous pacemakers

Answer 7

Internal factors which contribute to the internal clock
E.G SN

Question 8

Siffre

Answer 8

Extended periods of time in cave - no nat light
Sleep wake = 25-30hrs

Question 9

Russel et al

Answer 9

Women sweat on lips
MS synched

Question 10

Aschoff + Weaver

Answer 10

4 weeks in WW2 bunker
All but 1 cycle = 25 hrs
Exo affect - endo control

Question 11

Reinberg

Answer 11

Women 3 months cave
MS from 28 days to 25.7 days

Question 12

Strengths of bio rhythms

Answer 12

RS support
Evolutionary expl for MS synch - preggers same time - cared collectively

Question 13

Weaknesses of bio rhythms

Answer 13

Individual differences
Ps likely knew aim of studies