Biopsychology: exogenous zeitgebers

Question 1

what is an exogenous zeitgeber?

Answer 1

.an external factor which rests the biological clock
.external cues that help regulate rhythms

Question 2

what is an example of an exogenous zeitgeber?

Answer 2

.light

Question 3

how does light work as an exogenous zeitgeber?

Answer 3

.received photoreceptors in the retina
.suppresses melatonin production from the pineal gland which keeps us alert

Question 4

who conducted the study that supports the role of exogenous zeitgebers?

Answer 4

.czeisler

Question 5

what did czeisler find?

Answer 5

.found artificial light was able to entrain participants circadian rhythms from 22-28 hours

Question 6

how does what czeisler found support the role of exogenous zeitgebers?

Answer 6

.shows the power of artificial light to override the SCN