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1.Describe two studies into Circadian biological rhythms. (12marks)

A Circadian Rhythm occurs once every 24 hrs, Circadian is Latin and stands for ‘about a day’, examples of these are the human sleep waking cycle and other physiological systems such as body temperature.

These cycles can be important for survival, such as nocturnal animals avoid predators by remaining hidden during the day, there biological clock allows them to anticipate the recurring events such as sunrise or darkness.

The study conducted by Michel Siffre in 1972, showed tha...

Posted by: Carlos Hernandez

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