endogenous pacemakers & exogenous zeitgebers

Question 1

ENDO - suprachiasmatic nucleus

Answer 1

bundle of nerve cells in the hypothalamus, above the optic chiasm, sensitive to light.

Question 2

Decoursey (2000)

Answer 2

the scn of chipmunks were destroyed before being sent back to their natural habitat, after 80 days, a significant number had been killed due to being out at knight

Question 3

the pineal gland

Answer 3

pea sized gland behind hypothalamus, receives info about light levels from the scn and produces melatonin - prompts us to sleep

Question 4

EXO - light and social cues

Answer 4

light can reset the scn and indirectly influences hormones. Campbell & Murphy were able to affect participants sleep/wake by up to three hours by waking them up and shining a light on the backs of their knees

Question 5

additionally

Answer 5

adapting to local times for eating and sleeping is an effective way to beating jet lag.