Outline what is currently known about the regulation of food intake and energy homeostasis. Include
the roles of basal and total metabolic rates, leptin, and neuropeptide Y in your response. What will be an ideal response?
Concepts to Consider: Leptin is produced by fat cells in proportion to the body fat mass, and
receptors for this molecule have been found in the hypothalamus. A decrease in body fat results in a
decrease in leptin, which leads to an increase in food intake; an increase in body fat results in an
increase in leptin, leading to a decrease in food intake. Neuropeptide Y is produced in the
hypothalamus, and increases appetite and slows metabolism when leptin levels and food intake are
low. BMR is the rate of energy consumption during resting conditions. TMR includes BMR and the
additional energy for the remaining daily activities. These rates are important because energy in should
equal energy out to maintain homeostasis and avoid weight gain
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How did the control group differ from the
experimental group in the butterfly experiment?
a. They were different species. b. Their native habitat of the forest differed. c. They were spotless and soundless. d. They tasted worse. e. They preferred different flowers species
Of all the plant hormones, which one is a gas?
a. auxin b. cytokinin c. gibberellin d. ethylene e. abscisic acid
Mutations that are not passed on from one generation to the next:a
result from disruptive selection. b. are balanced polymorphisms. c. arise in somatic cells. d. result from the founder effect. e. result from genetic drift
Malignant plasma cells exhibiting CD38, CD56, and CD138 are found in:
A. Waldenstrom macroglobulinemia. B. chronic myeloid leukemia. C. multiple myeloma. D. monoclonal gammopathy of undetermined significance