Question

what causes sleep in humans

Answer 1

Answer:

In response to light, such as sunlight, the pineal gland turns off the production of melatonin, a hormone that causes a feeling of drowsiness. The levels of melatonin in the body normally increase after darkness, which makes you feel drowsy.

Many biological processes happen during sleep:

The brain stores new information and gets rid of toxic waste.

Nerve cells communicate and reorganize, which supports healthy brain function.

The body repairs cells, restores energy, and releases molecules like hormones and proteins.

These processes are critical for