Question

Which of the following is correct regarding leptin?

1) Ob mice lack the gene that codes for ghrelin.
2) Leptin produces a decrease in metabolic rate.
3) Leptin stimulates eating.
4) Leptin levels in the blood are proportional to the fat stores of the body.
5) Leptin release is stimulated by the entry of food into the duodenum.

Answer 1

Leptin is a hormone produced by adipose tissue that regulates appetite and energy expenditure. It is released in response to food intake and controls hunger by giving a feeling of fullness. Leptin levels in the blood are proportional to the fat stores of the body.

Step-by-step explanation:

Leptin is a hormone produced by adipose tissue that regulates appetite and energy expenditure. It is released in response to food intake and controls hunger by giving a feeling of fullness. Leptin levels in the blood are proportional to the fat stores of the body, so more fat leads to more leptin and less hunger. Therefore, the correct statement regarding leptin is that option 4: Leptin levels in the blood are proportional to the fat stores of the body.