Quiz-449-Circadian Rhythm and Fatigue

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Why is chronic partial sleep loss considered particularly dangerous for air medical crews compared to acute total sleep deprivation? *

Chronic partial sleep loss and self-assessment

It causes immediate loss of consciousness

Individuals lose the ability to accurately self-assess their level of impairment

It results in a higher blood alcohol equivalent than acute sleep loss

It only affects physical performance, not cognitive function

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A crew member takes a 45-minute nap before a night shift. Upon waking, they experience significant grogginess and slowed reaction times. What is the most likely cause of this state? *

Strategic napping and sleep inertia

Sleep inertia resulting from waking during slow-wave sleep

Excessive caffeine consumption prior to the nap

A microsleep episode occurring during the nap

Dehydration due to the low humidity of the aircraft

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During a night shift, which dietary choice is most likely to sustain energy levels without provoking postprandial sleepiness? *

Nutritional strategies for alertness

A large, high-carbohydrate meal

Small, protein-rich meals with low glycaemic index carbohydrates

Consuming only caffeine and skipping solid food

A high-fat meal to slow digestion

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Which cognitive domain is the first and most reliably impaired by fatigue, directly impacting patient monitoring and instrument scanning? *

Cognitive domains vulnerable to fatigue

Emotional regulation

Working memory

Vigilance and sustained attention

Executive function and risk appraisal

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