Final answer:
The answer to the question is a) High; less. Full fat cells produce high levels of leptin, which decreases the reward of eating by inducing satiety. Leptin is a hormone that helps control appetite and body weight by signaling fullness to the brain.
Step-by-step explanation:
When fat cells are full, they produce high levels of leptin, which makes eating less internally rewarding/satisfying. The correct answer is: a) High; less. Leptin, often referred to as the satiety hormone, is produced by adipose tissues and plays a crucial role in regulating long-term food intake and energy expenditure. Its primary function is to communicate with the brain, particularly the hypothalamus, to signal fullness and reduce the desire to eat.
When an individual has more adipose tissue, their body releases more leptin, which acts to decrease hunger and induce a feeling of satiety. Conversely, when there is less adipose tissue, there's a reduced level of leptin, leading to increased hunger. Individuals who are obese may experience leptin resistance, where despite high levels of leptin, the feeling of satiety is not adequately triggered, resulting in continued eating and potential weight gain.