Endogenous Pacemakers & Exogenous Zeitgebers 0.0 / 5 ? PsychologySleepA2/A-levelAQA Created by: Keyleigh-StormCreated on: 30-05-16 00:17 83421571069 Across 1. IDA - Another adaptive advantage would be that biological rhythms allow an animal (or plant) to anticipate daily ------------- events, such as the patterns of light and dark. (13) 4. IDA - There're enormous health, safety & economic -------- to figuring out how the circadian clock works, because desynchronised body clocks reduce alertness & can lead to accidents. (8) 5. The process o resetting the biological clock with exogenous zeitgebers is known as -----------. (11) 6. Who found that circadian rhythms can be entrained by ordinary dim lighting, although bright lighting is more effective? (6, 2, 2) 9. The basis of the circadian rhythm lies in interactions between certain --------, creating the 'tick' of the biological clock; it's an ingenious negative feedback loop. (8) Down 2. If dim lighting does reset the biological clock then the fact that we live in an artificially lit world may have some -------- consequences. (8) 3. Some research suggests that brain changes during adolescence lead to a form of delayed sleep phase syndrome, which would explain why some adolescents have rather unusual sleep --------. (8) 7. Light can ----- the body's pacemaker, the SCN. (5) 8. The SCN sends signals to the pineal gland, directing it to increase production of the hormone --------- at night - melatonin induces sleep by inhibiting the brain mechanisms that promote wakefulness. (9) 10. A lot of data is derived from experiments with animals = issue of ----, as with DeCoursey's chipmunks). (4)
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