[Solved] One gene scan of 40,000 people worldwide identified a variant of a gene called FTO. This gene nearly doubles the risk of A) neophobia. B) a low set point. C) erotic plasticity. D) obesity. Double Bind: A situation in which a person receives conflicting messages, making it impossible to appropriately respond or resolve the situation. Narcotic Antagonist: A medication that blocks or reverses the effects of opioids. Endorphin Receptor Sites: Specific areas on cell surfaces that bind endorphins, leading to pain relief and feelings of pleasure. Agonist Drugs: Substances that activate neurotransmitter receptors to produce a biological response, often mimicking the action of naturally occurring substances.