key concepts

Question 1

functions of sleep

Answer 1

Physical repair to return the body to a normal,
healthy state - healthy brain that functions normally

Emotional stability (feeling normal and
psychologically healthy)

Instinctive and necessary for survival (evolved behaviour)- keeps us safe at night

Question 2

sleep cycle

Answer 2

Stage 1 - 10%
Stage 2 - 50%
Stage 3 - 10%
Stage 4 - 10%
Rapid Eye Movement - 20%

Question 3

Endogenous pacemakers

Answer 3

internal biological clocks- manage circadian rhythms (e.g. Suprachiasmatic nucleus)

Question 4

Exogenous Zeitgebers

Answer 4

features of the environment that manage circadian rhythms (e.g. light)

Question 5

Hypothalamus

Answer 5

controls key bodily functions

Question 6

Melatonin

Answer 6

hormone that induces sleep. Released by
the pineal gland.