[Campbell Biology P.932] The text mentions that 'flying across several time zones results in... | Practice Question
The text mentions that 'flying across several time zones results in jet lag.' Which of the following best explains why jet lag occurs in relation to the human circadian rhythm?
A: Jet lag is caused by a permanent alteration of the biological clock due to external stimuli.
B: It reflects a temporary mismatch between the body's internal circadian rhythm and the new local environment's light-dark cycle.
C: Melatonin secretion is completely inhibited by rapid changes in time zones, leading to sleeplessness.
D: The pineal gland is damaged by the pressure changes during flight, affecting hormone production.
Explanation
The text explicitly states: 'That is why flying across several time zones results in jet lag, a mismatch between the circadian rhythm and local environment that persists until the clock fully resets.'