endogenous and exogenous

Question 1

define endogenous zeitegebers

Answer 1

• internal body clock
• suprachiasamtic nucleus linked to pineal gland
• sns linked to other areas of the brain responsible for sleep
• sns recieves info about light levels
• low level of light = melatonin due to sns signal = induces sleep

Question 2

what is an exogenous zeitgeber

Answer 2

• environmental events
• social cues such as meal time and actiivties
• light = resets body clock

Question 3

not sperate

Answer 3

• limited research as they are seen as seperate
• their affects should be combined to be more holistic

Question 4

exogenous - confounding variable

Answer 4

• artifical light is always present
• not controlled = reduces reliability

Question 5

siffres study

Answer 5

• entered a cave and had no natural light
• came out mid september and thought it was mid august
• shows that light helps maintain 24 hour circadian rhyhtms