Category: Everyday Science | Last updated: 2026-09-18
What is the primary function of the hormone melatonin, often associated with the sleep-wake cycle?
A) Regulating blood sugar levels
B) Inducing feelings of hunger
C) Signaling the body's readiness for sleep
D) Strengthening bone density
Explanation
Melatonin is a hormone primarily produced by the pineal gland that plays a crucial role in regulating the sleep-wake cycle by signaling to the body when it's time to sleep.