Circadian Rhythms

1. ------- production also follows a circadian rhythm. (7)
4. There's a slight --- in body temperature just after lunch which isn't just due to the effects of eating lunch - the dip occurs even when people haven't eaten. (3)
6. One important type of individual difference is the cycle ------. (6)
7. -------- (hormone produced when we're stressed but is also related to making us alert when we wake up) is lowest around midnight and peaks at around 6am & can explain why, if we wake up at 4am, it's hard to think clearly (levels aren't high enough). (8)
8. One important type of individual difference is the cycle ----- (individuals appear to be innately different in terms of when their circadian rhythms reach their peak). (5)
10. Who found that performance on IQ tests was best at 7pm as compared with 9am or 2pm? (5)

2. IDA - Deterministic view and may be ---------- - internal mechanism is very powerful but there is some flexibility in the system (e.g. we can go to bed 2 hours later than normal & wake up at the same time the next day, without too much difficulty). (10)
3. Who placed participants in an underground WW2 bunker in the absence of any environmental & social cues and found that most people displayed circadian rhythms between 24-25 hours in length, but some were as long as 29 hours? (7, 3, 5)
5. Who said it may be that higher core body temperature leads to increased physiological arousal and this leads to improved cognitive performance? (6, 2, 2)
9. The ---- ---- temperature is one of the best indicators of the circadian rhythm - lowest at about 4.30am (36*c) and highest about 6.00pm (38*c). (4, 4)

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