Pinealocyte

Definition

Pinealocytes are the main cells found in the pineal gland, responsible for producing and secreting the hormone melatonin, which regulates sleep patterns. These cells respond to light exposure and help synchronize the body's circadian rhythm with the environment.

Related terms

Melatonin: A hormone produced by pinealocytes that helps regulate sleep-wake cycles.

Circadian rhythm: The body's internal clock that operates on a roughly 24-hour cycle, influencing physiological processes including sleep-wake patterns.

Pineal gland: A small endocrine gland in the brain that produces melatonin, regulated by light exposure and darkness