L12.2 - Exogenous Zeitgebers

Question 1

Info on light levels is used to

Answer 1

Synchronise activity of organs and glands 
Reset EP (SCN)

Question 2

Which protein in the retina is important for this?

Answer 2

Melanopsin

Sensitive to natural light

Question 3

What things can affect the body clock?

Answer 3

Moving to a night shift

Move to country with different time zone

Question 4

How do the two factors affect the body clock?

Answer 4

Endogenous pacemakers try to impose in built sleep rhythm

But out of sync with light EZ

Question 5

Disrupted biological rhythms lead to

Answer 5

Disrupted sleep patterns
Increased anxiety
Decreased alertness and vigilance

Question 6

+ related to light perception

Answer 6

Blind people with light perception had normal circadian rhythms
Those with no light perception had abnormal ones

Question 7

+ related to lab study

Answer 7

One group in artificial warm light, another in artificial blue light
Warm light circadian rhythms synchronised with natural light of dawn
Blue light synchronised with office hours

Question 8

• related to reductionism

Answer 8

Biologically reductionist
Behaviourism would argue bodily rhythms inclined by other people, e.g. sleep when dark as social norm so wouldn’t do daily routines