Q:

From childhood to old age

safaTerkawi
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2022-08-18
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From childhood to old age.

  1. There is a steady decrease in total sleeping time per day.
  2. Deep (stage 4) sleep increases as a percentage of total daily sleep.
  3. Brain mass steadily decreases.
  4. Body water decreases as a percentage of body mass.
  5. Sleep becomes less aggregated into a single sleeping period.
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safaTerkawi
2022-08-18
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A. True The elderly seem to need less sleep.

B. False This percentage also falls steadily.

C. False It increases markedly in early childhood.

D. True From over 80 per cent in the fetus to less than 50 per cent in old age.

E. True Though aggregation increases in infancy, it later declines steadily

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