Bright light affects the timing of body rhythms by reducing the amount of _____ produced by the pineal gland.
A)melatonin
B)serotonin
C)acetylcholine
D)androgen

Question

Quizplus · Accepted Answer

The pineal gland produces melatonin, a hormone that is responsible for regulating the timing of our sleep-wake cycle or circadian rhythm. Bright light, especially in the morning, suppresses melatonin production, thereby resetting the internal clock and shifting the timing of our body rhythms. Conversely, exposure to dim light, particularly at night, increases melatonin secretion, promoting sleepiness and preparing the body for rest. Thus, melatonin plays a pivotal role in regulating our daily rhythms and helping us adapt to changes in the environment.

Bright Light Affects the Timing of Body Rhythms by Reducing