[Solved] Freud believed that in childhood, which of the following have lasting effects on development? A) feelings of inferiority B) erotic urges C) conditions of worth D) instrumental and expressive behaviors Serotonin: A neurotransmitter involved in the regulation of mood, appetite, and sleep, among other functions. Ecstasy: Often referring to MDMA (methylenedioxymethamphetamine), a psychoactive drug primarily used for recreational purposes to enhance sensations of emotional warmth and increased energy. Circadian Clock: An internal mechanism that regulates biological rhythms and cycles, affecting sleep, wakefulness, and other physiological processes in a roughly 24-hour cycle. Near-Death Experiences: Phenomena reported by some individuals who have been close to death but survived, often involving a sense of detachment from the body and visions.