Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 47, Problem 2S
Suppose that you wanted to develop a new treatment for obesity based on the hormone leptin. What structures in the body produce leptin? What does it do? Should your treatment cause an increase in blood levels of leptin or a decrease? Could this treatment affect any other systems in the body?
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Chapter 47 Solutions
Biology
Ch. 47 - How is the digestion of fats different from that...Ch. 47 - Although the stomach is normally thought of as the...Ch. 47 - After being absorbed through the intestinal...Ch. 47 - Which of these pairings is incorrect? a. Fat...Ch. 47 - Intestinal microorganisms aid digestion and...Ch. 47 - Prob. 6UCh. 47 - Which of the following represents the action of...Ch. 47 - Prob. 1ACh. 47 - The primary function of the large intestine is to...Ch. 47 - Inactive forms of some molecules are secreted a....
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- A person has undergone fasting. What type of feedback mechanism is exhibited by his body to sustain his blood sugar and for it not to drop in critical level even though he is not consuming enough carbohydrates to sustain his normal blood sugar level?arrow_forwardSupply four of the pieces of advice the text provides for successful dieting and weight loss. How might you have to change your current routine to follow your text's advice if you wished to lose weight or prevent unwanted weight gain?arrow_forwardExplain how appetite is controlled by the brain. What is the benefit ofhaving a hormone released from adipose cells in proportion to total fatmass?arrow_forward
- Which statement best describes the relationship between the hypothalamus and obesity? Select an answer from the options below The hypothalamus stimulates the gene mutation that causes addiction, which contributes to overeating and obesity. The structure of the hypothalamus is changed by high-fat diets, which makes it harder for the body to regulate its weight. The hypothalamus controls the thyroid gland, which causes one to rapidly gain weight. The hypothalamus triggers the amygdala, which produces highly enjoyable feelings that are eventually associated with food.arrow_forwardIn controlled clinical trials, the consumption of soft drinks containing artificial sweeteners was observed to result in an increased appetite for carbohydrate-containing foods. Based on your knowledge of appetite control by the brain, speculate as to why this phenomenon occurs.arrow_forwardWhy is it important for the diet to provide enough carbohydrates in order for the body to be able to make optimal use of dietary protein? Why might a high-protein diet not be the healthiest option for weight loss and weight loss maintenance?arrow_forward
- If rats are limited to eating for one hour a day, what determines whether or not they will lose weight?arrow_forwardDecide whether each of the following statements is true or false. If false, explain why.(a) The amino acid pool is found mainly in the liver.(b) Nitrogen-containing compounds can be stored in fatty tissue.(c) Some hormones and neurotransmitters are synthesized from amino acids.arrow_forwardWhich is an example of a feedback mechanism in the body?a. The decrease in oxygen levels in the blood after exercise.b. The use of energy when muscles contract?c.The release of insulin into the bloodstream when blood sugar increases.d. The movement od salts from cells into the bloodstream.arrow_forward
- The hormone insulin enhances the transport of glucose (sugar) from the blood into most body cells. Its secretion is controlled by a negative-feedback system between the concentration of glucose in the blood and the insulin-secreting cells. Therefore, which of the following statements is correct? A decrease in blood glucose concentration stimulates insulin secretion, which in turn further towers blood glucose concentration. An increase in blood glucose concentration stimulates insulin secretion, which in turn lowers blood glucose concentration. A decrease in blood glucose concentration stimulates insulin secretion, which in turn increases blood glucose concentration. An increase in blood glucose concentration stimulates insulin secretion, which in turn further increases blood glucose concentration. None of the preceding is correct.arrow_forwardSome nutritionists claim that the secret to long life is to be slightly underweight as an adult. If a persons weight is related partly to diet, partly to activity level, and partly to genetics, what underlying factors could be at work to generate statistics that support this claim?arrow_forwardIf you fed an experimental animal (a mammal) a special food that consisted of all 20 amino acids, glucose and a wide variety of fatty acids, along with all needed vitamins and minerals, how would its digestive system handle this food? What would be normal and what, if anything, would be abnormal about its food processing? Is it likely to be adequately nourished?arrow_forward
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