Question

Each night at 10 pm, Jiao becomes very sleepy. This is most likely because _________.

a. Jiao has a circadian rhythm aligned with that time.
b. Jiao has insomnia.
c. Jiao is a night owl.
d. Jiao is not getting enough sunlight during the day.

Answer 1

Jiao becoming very sleepy each night at 10 pm is likely due to their circadian rhythm being aligned with that time.

Step-by-step explanation:

Jiao becoming very sleepy each night at 10 pm is most likely because Jiao has a circadian rhythm aligned with that time. Our circadian rhythms are daily cycles of behavior and are generally aligned with the outside world. Melatonin, a hormone released by the pineal gland in response to darkness, helps regulate our sleep-wake cycles. Jiao's sleepiness at 10 pm suggests that their circadian clock is aligned with that time.