An Analysis of the Effect of Constituent Division of Reading Texts on Students of English as a Second Language Page: 77
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77
This is true everywhere, even above the Arctic Circle, where summer
brings constant daylight. The 24-hour clock remains steadfast
despite efforts to change it. Forty years ago,
Dr. Nathaniel Kleitman, a University of Chicago physiologist,
descended into Mammoth Cave, Kentucky, to eliminate the influence
of the natural dark-light cycle and attempt to reset
his body clock to a 28-hour day using artificial lighting.
However, his wakefulness rhythm failed to adapt to the new schedule.
He had trouble falling asleep after turning out the lights,
and he awoke too early.
Over the years, scientists have found that at least 40 functions
of the body have rhythms that are timed by the biological clock.
Temperature, for example, is regulated so that it is
at least two degrees higher in the late afternoon than the low point
in the early morning hours. Peak efficiency is reached
at certain periods of the day. Time zone effects of air travel
cause jet lag. There are also daily rhythms in blood-pressure levels,
blood-sugar levels, pulse rate, and even stomach contractions.
The effectiveness of drugs given to a patient varies depending on
what hours of the day or night they are given. It is likely
there are best and worst times to perform surgery, take X-rays,
and diagnose disease; but these have tended to be masked
in the process of evolution.--TURN YOUR PAPER OVER AND LOOK AT THE INSTRUCTOR--
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Childress, Anita Gaye. An Analysis of the Effect of Constituent Division of Reading Texts on Students of English as a Second Language, thesis, December 1986; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc501132/m1/82/: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .