Which of the following describes a relationship between leptin and energy balance?
a. Fat cell sensitivity to leptin is higher in obese people.
b. A deficiency of leptin is characteristic of all obese people.
c. Blood levels of leptin usually correlate directly with body fat.
d. Major functions of leptin include an increase in hunger and a decrease in metabolic rate.
e. Blood levels of leptin only correlate with body fat at extremely high and low body masses.
ANS: C
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