Catherine, Ann, Paul and Alex are 4 friends who have been in Sydney for four weeks' holiday. They are now flying back home to London. Who would you expect to have the least jetlag?Group of answer choicesPaul, who has a free-running circadian rhythm of 23.5 hoursCatherine, who has a free-running circadian rhythm of 24.5 hoursAlex, who has a free-running circadian rhythm of 23.0 hoursAnn, who has a free-running circadian rhythm of 24.0 hours
Question
Catherine, Ann, Paul and Alex are 4 friends who have been in Sydney for four weeks' holiday. They are now flying back home to London. Who would you expect to have the least jetlag?Group of answer choicesPaul, who has a free-running circadian rhythm of 23.5 hoursCatherine, who has a free-running circadian rhythm of 24.5 hoursAlex, who has a free-running circadian rhythm of 23.0 hoursAnn, who has a free-running circadian rhythm of 24.0 hours
Solution
Jet lag is a physiological condition which results from alterations to the body's circadian rhythms caused by rapid long-distance trans-meridian (east–west or west–east) travel. The direction of travel matters because traveling eastward, as in this case from Sydney to London, tends to cause more severe jet lag than traveling westward.
The closer someone's free-running circadian rhythm is to the 24-hour cycle, the less jet lag they are likely to experience. This is because their body's natural sleep-wake cycle is closer to the actual day-night cycle.
In this case, Ann, who has a free-running circadian rhythm of 24.0 hours, would be expected to have the least jet lag. Her circadian rhythm is exactly in line with the 24-hour day, so her body will have the easiest time adjusting to the new time zone.
Similar Questions
Which of the following is required for jetlag? (There may be more than one correct answer. Please select all correct answers.)Group of answer choicesTravelling on a planeTravelling over time zonesTravelling to another countryTravelling faster than the circadian rhythm can adapt
When does jetlag occur?Group of answer choicesWhen people fly in a straight line from north to southWhen any plane travel is undertakenAfter a flight that crosses time zonesWhen the light-dark cycle on the plane does not match a passenger's circadian rhythm
Which of the following rosters would lead to the greatest circadian disruption?Group of answer choices1 day shift, 1 evening shift, 1 night shift, 1 day shift, 1 evening shift, 1 night shift3 evening shifts, 3 night shifts3 evening shifts, 3 day shifts2 day shifts, 2 evening shifts, 2 night shifts
The least circadian disruption is expected for those who work regular shifts from:Group of answer choices14:00 to 22:0008:00 to 16:004:00 to 12:0020:00 to 4:00
Consider your dream holiday destination overseas and work through the following questions: Where will you travel to?What is the time difference between your destination and Sydney? If you were to fly to your destination from Sydney, what does your circadian rhythm need to do to adapt to the new time zone?After adapting to the new time zone, what does your circadian rhythm need to do when you return back to Sydney?What kinds of strategies would you normally use to overcome jetlag? Is there anything you would do differently after learning about circadian rhythms?
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