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CELPIP Reading Part 3: Reading for Information

CELPIP Reading Part 3 Practice Test: The Science Behind Human Sleep Cycles

By Iris

A free Reading Part 3 practice test in the CELPIP format: 9 questions with the answer key. Choose your answers, then check them at the bottom of the page.

Questions
9
Time
about 10 minutes
Question style
Match each statement to a paragraph

Paragraph A

Human sleep cycles consist of stages transitioning every 90-120 minutes, starting with light non-REM where heart rate slows. Stage 2 features sleep spindles, aiding memory consolidation. Deep non-REM (stages 3-4) promotes physical repair and growth hormone release. REM sleep follows, with rapid eye movements and vivid dreams. Cycles repeat 4-6 times nightly. Benefits include cognitive restoration. Challenges are disruptions from stress. Understanding polysomnography monitors these phases.

Paragraph B

Circadian rhythms, driven by the suprachiasmatic nucleus, regulate sleep-wake cycles via light exposure. Melatonin rises in darkness, inducing drowsiness. Jet lag desynchronizes this internal clock. Shift workers face health risks from misalignment. Benefits of alignment are improved mood. Challenges include seasonal affective disorder in low-light areas. Examples show blue light from screens suppressing melatonin. Hormonal balance supports restful sleep.

Paragraph C

Sleep disorders like insomnia involve difficulty initiating cycles, often from anxiety. Obstructive sleep apnea interrupts breathing in deep stages. Narcolepsy causes sudden REM onset. Treatments include CPAP machines or cognitive therapy. Benefits are enhanced daily function. Challenges encompass undiagnosed cases leading to accidents. Polysomnias like sleepwalking occur in non-REM. Research links poor sleep to chronic diseases.

Paragraph D

Polyphasic sleep experiments divide rest into short naps, but evidence favors monophasic patterns. Infants have shorter cycles, evolving with age. Exercise and diet influence cycle quality. Benefits include better immunity from adequate REM. Challenges are caffeine's interference. Future tech like wearables track cycles for optimization. Overall, science emphasizes 7-9 hours for adults. Innovations aim to mimic natural rhythms.

Decide which paragraph, (A) to (D), has the information given in each statement below. Select (E) if the information is not given in any of the paragraphs.

  1. Light non-REM stages begin cycles with reduced heart rates for relaxation.
  2. Melatonin production increases in dark environments to promote sleep onset.
  3. Narcolepsy primarily affects deep non-REM stages during nighttime.
  4. Sleep spindles in stage 2 contribute to processing and storing memories.
  5. Polyphasic patterns are recommended for adults to maximize productivity.
  6. Obstructive apnea disrupts breathing, requiring devices like CPAP for relief.
  7. Circadian misalignment can lead to issues like jet lag or shift work fatigue.
  8. Wearables are emerging to monitor and improve personal sleep cycles.
  9. REM sleep is associated with physical repair and hormone secretion.
0 of 9 answered

Answer key

Show all 9 answers
  1. Light non-REM stages begin cycles with reduced heart rates for relaxation. A
  2. Melatonin production increases in dark environments to promote sleep onset. B
  3. Narcolepsy primarily affects deep non-REM stages during nighttime. E
  4. Sleep spindles in stage 2 contribute to processing and storing memories. A
  5. Polyphasic patterns are recommended for adults to maximize productivity. E
  6. Obstructive apnea disrupts breathing, requiring devices like CPAP for relief. C
  7. Circadian misalignment can lead to issues like jet lag or shift work fatigue. B
  8. Wearables are emerging to monitor and improve personal sleep cycles. D
  9. REM sleep is associated with physical repair and hormone secretion. E

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