Question

A circadian rhythm is a chemical clock. In the absence of light or other stimuli to entrain it, its speed depends on reaction rates. As a rule of thumb reaction ratesdouble every 10Cas long as the enzymes don't denature. The rule of thumb predicts that a mild 0.5C temperature change would alter the 24 hour cycle by almost an hour/day, which is quite noticeable. Does (non-hazardous) heat/cold exposure advance/delay the circadian rhythm? If so, is it in line with the rule of thumb?

Answer 1

Circadian rhythms are biological rhythms controlled by a biological clock. Exposure to heat or cold can advance or delay the circadian rhythm, following the rule of thumb for temperature changes.

Step-by-step explanation:

Circadian rhythms are biological rhythms that repeat approximately every 24 hours. These rhythms are controlled by a biological clock located in the brain. The circadian rhythm can be influenced by various factors, including temperature changes. According to the rule of thumb, a mild 0.5C temperature change can alter the 24-hour cycle by almost an hour per day. Therefore, exposure to heat or cold can advance or delay the circadian rhythm, depending on the direction of temperature change.