Role of Ghrelin in Hunger Regulation

In the study of motivation and emotion, the concept of hunger regulation is multifaceted, including physiological and psychological components. Among the various theories of hunger, some suggest that biochemical signals in the body play a critical role in initiating feeding behaviors. One prominent hormone associated with hunger is ghrelin, which is produced in the stomach and acts on the hypothalamus. Understanding the interrelationship of hormones like ghrelin, alongside others such as leptin, provides insight into why individuals experience moments of intense hunger, even after consuming adequate calories.

Which of the following statements best explains the role of ghrelin in hunger regulation?