Question

What effect does the light from cell phone screens have on the human body?

1) It releases a hormone called tryptophan in the blood stream.
2) It causes extra neurological impulses to fire in the brain.
3) It reduces the amount of sleep-inducing melatonin released.
4) It destroys brain cells that the brain relies on for memories.

Answer 1

Cell phone screen light reduces the production of melatonin, a hormone responsible for sleep, which can disrupt sleep patterns and circadian rhythms.

Step-by-step explanation:

The light from cell phone screens influences the human body's circadian rhythms by impacting melatonin production. The blue light emitted from screens inhibits the secretion of melatonin, a sleep-inducing hormone produced by the pineal gland. This hormone release is stimulated by darkness and inhibited by light, therefore, exposure to cell phone light, especially at night, can reduce melatonin levels and disrupt sleep patterns. Such disturbances in circadian rhythms may lead to difficulty falling asleep, insomnia, or poor sleep quality. It's advisable to minimize phone screen exposure before bedtime to help maintain the natural rhythm of sleep-wake cycles.