Biopsychology circadian rhythms - AQA A level psychology full 16 mark essay plans
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The Complete Companion for AQA, Psychology A Level
16-mark essays written in an easy-to-digest format. Written by a current A2 student predicted A* in AQA A-level psychology.
Please note all the notes have been written by myself however it's not an original format.
Discuss explanations of a nicotine addiction (16 marks)
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Outline and evaluate Circadian rhythms
SCN
Sleep-wake cycle Body temperature & Supporting study Application Not supporting study
hormone production
Light and darkness are the
external signals to determine
T – Research on circadian
SCN – Suprachiasmatic nuclei,
when we feel sleepy or when the master pacemaker in the rhythms has led to useful
T – There is evidence to applications T – There is evidence to
to wake up. Circadian rhythms hypothalamus which resets to
also dip and rise at different make our bodies be in support the role of external suggest external signs do
signs on circadian E – One application is
times of the day, so the synchrony with the outside not have an impact on
strongest sleep drive is usually world. Setting the body clock hormones. chronotherapeutics which
circadian rhythms.
between 2-4am and 1-3pm. to the right time is called is the study of how timing
These are more intense if we
E – There is research for the affects drug treatments E – Innuit Indians live in the
photoentrainment
have not had sufficient sleep. presence of the circadian artic circle
Core body temperature is a hormone release in 4 males E - Drug treatment success
(Cultural/individual
Homeostasis also controls our good indicator of circadian (androcentric, not reliable relies on the timing that
differences/correlational)
sleep-wake cycle. The need to rhythms as it’s at its lowest the medicine reaches the
>> individual differences) where summer has loads of
restore lost energy from (36degrees) at 4:30am and its blood stream. It’s essential
wakefulness increases highest (38degrees) at 6pm. In light and winter has none.
for the right concentration
throughout the day and a normal circadian rhythm, you E – 3 Months of continuous to target the correct area E – If the sleep-wake cycle is
reaches its peak in the evening sleep when core temp begins darkness changed cortisol of the body at the time primarily controlled by light,
when most people sleep. So to drop and wake when core
levels at diff times, peak when the drug is most it would be the case that
the circadian rhythm keeps us temp rises during the last
cortisol level at noon needed. E.g heart attacks they would sleep loads in
awake as long as there’s hours of sleep. A drop in body
daylight, prompting us to sleep temperature in the afternoon
compared to normal peak in are the greatest risk during winter and not a lot in
when it’s dark. (2-4) also explains why people the morning when u wake the early morning hours summer, but this is not the
feel sleepier in the afternoon. up and lowest level in after waking. case. They maintain a
The circadian clock is free- evening (correlation) regular pattern of sleeping
running and maintains a cycle Hormone release follows a This means a person can
(confounding variables like and waking all year round.
of 24 hours even in the circadian rhythm e.g the take a drug at 10pm and it
artificial light).
absence of external cues. release of melatonin from the won’t be delivered until the T - This suggests that EZ may
However, any major pineal gland with peak levels in T - Supports the idea that vulnerable period at 6am not have a substantial effect
alterations can cause the the hours of darkness which external light influences the on circadian rhythms.
biological clock and internal encourages sleep and when it T – Research into circadian
hormones in the circadian
psychological systems to is light, melatonin levels rhythms has useful
rhythms
become out of balance e.g decrease and the person applications which can be
Michel Siffre in his cave his wakes.
used irl.
circadian rhythms increased
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