WorksheetsIntroduction to Sleep
Total questions: 10
Worksheet time: 5mins
According to the session overview on sleep, which objective best focuses on clarifying terminology before exploring mechanisms?
Explain the physiology of sleep
Describe the phases of sleep
Define the term Rest & Sleep
List out the factors promoting sleep
Using the graph of cortisol and melatonin across a 24-hour period, which statement best describes the relationship between melatonin and cortisol during nighttime?
Both hormones peak simultaneously at midnight
Melatonin rises to a peak while cortisol remains low
Cortisol peaks while melatonin is suppressed
Both hormones decline steadily from evening to morning
Based on the sleep-wake hormone diagram, which time window is most consistent with the onset of melatonin rise?
Morning hours around 9 AM
Afternoon around 3 PM
Evening after sunset
Early morning just before waking
Interpreting the hormone graph, which temporal sequence best matches a normal circadian profile?
High melatonin at night followed by rising cortisol near morning
High cortisol throughout the night followed by melatonin peak at noon
Simultaneous peaks of cortisol and melatonin at sunrise
Alternating micro-peaks of both hormones every three hours
Considering the depicted circadian patterns, which timing aligns best with physiological readiness for sleep?
When cortisol is rising toward a morning peak
When melatonin is increasing and cortisol is decreasing in the evening
When both hormones are minimal in mid-afternoon
When melatonin is suppressed and cortisol is stable at midday
A clinician reviewing a patient’s sleep notes sees regular bursts of rapid eye movements with low muscle tone and characteristic EEG changes. Which sleep category is most consistent with these observations?
REM sleep
Stage 1 of NREM
Stage 3 of NREM
Wakefulness
Identify the accurate relationship between circadian rhythm and sleep stages implied by the section’s context.
Circadian rhythm organizes the timing of sleep cycles, while stages within sleep are classified as NREM and REM
Circadian rhythm defines the EEG patterns of each NREM stage
Sleep stages determine the timing of the circadian clock
Circadian rhythm only occurs during REM sleep
Which statement most accurately summarizes the section’s definition of the sleep cycle?
A repeating alternation between NREM (Stages 1–4) and REM sleep identified by EEG, eye movements, and muscle activity
A fixed progression from wakefulness directly to REM identified solely by eye movements
A random sequence of stages without measurable patterns
A single continuous NREM period followed by a single REM episode
Refer to the described visual: The slide states that about 75% to 80% of sleep during a night is NREM and lists four NREM stages (Stage 1–Stage 4). Which statement best applies strategic reasoning to identify the stage where arousal remains relatively easy while relaxation progresses and body functions continue to slow?
NREM Stage 1, lasting only a few minutes and representing the lightest sleep
NREM Stage 2, a 10–20 minute period of sound sleep with further EEG slowing and absent eyeball movements
NREM Stage 3, characterized by deep sleep and difficult arousal due to maximal physiological slowing
NREM Stage 4, marked by the deepest sleep with minimal responsiveness to external stimuli
If a sleeper is observed in NREM Stage 3, which stage is most likely next according to the cycle shown?
NREM Stage 1
NREM Stage 2
NREM Stage 4
REM Sleep
