In the context of AP Psychology, this term identifies a substance that initiates a physiological response when combined with a receptor. This interaction typically mimics the effects of a naturally occurring neurotransmitter or hormone. For example, certain drugs used to treat Parkinson’s disease act by mimicking dopamine, thereby stimulating dopamine receptors in the brain and alleviating symptoms associated with dopamine deficiency.
Understanding the concept is crucial for comprehending how psychoactive drugs and other substances affect behavior and mental processes. It sheds light on the mechanisms through which medications can alleviate psychological disorders or alter states of consciousness. The study of such interactions is rooted in the broader field of pharmacology and has significantly advanced the development of treatments for various conditions.
