When the levels of glucose and leptin circulating in the blood are sufficiently low, the impulse will be to stop (not eat) ?

Low levels of glucose puts the human body in the state of starvation after glycogen reserves in the liver (converted to glucose by gluconeogenesis) are depleted. In the state of starvation, the body uses fatty acids (from the adipose tissue) to be used for energy through beta-oxidation. Since the body is using fats from the adipose tissue, then the hormone leptin (an appetite suppressant hormone, an indicator of satiety) is decreased. Since leptin is decreased, the person's appetite is increased. This is also potentiated by an empty stomach as this triggers to secrete ghrelin, an appetite stimulant hormone. So the answer for this question is false, the person will actually feel hunger and start eating when glucose and leptin levels are low.