Chemical messengers produced by the endocrine glands, traveling through the bloodstream to target cells or organs, influence various bodily functions. Examples include insulin regulating blood sugar and adrenaline triggering the “fight or flight” response. These substances bind to specific receptors, initiating a cascade of events leading to altered cellular activity.
Understanding these chemical signals is fundamental in psychology because they critically impact behavior, mood, and cognitive processes. A deficiency or excess can result in psychological disorders, highlighting the intricate relationship between the endocrine system and mental well-being. Historically, research into these substances has significantly advanced our comprehension of stress, aggression, and sexual behavior.
