Final answer:
A person may eat when hunger sensations are absent because there are physiological and psychological factors that influence hunger. These factors include the contraction of an empty stomach, chemical signals from the pancreas and liver, and the release of leptin from fat cells. Psychological factors like worry, anxiety, and pleasant surroundings can also affect hunger.
Step-by-step explanation:
A person may eat when hunger sensations are absent because there are multiple physiological mechanisms that regulate hunger and eating. These mechanisms include the contraction of an empty stomach, chemical signals from the pancreas and liver, and the release of leptin from fat cells. However, hunger can also be influenced by psychological factors such as worry, anxiety, and pleasant surroundings.