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Concept explainers
The causes of eating disorders are complex and poorly understood. Genes apparently play a role; people with a close relative who has an eating disorder are about five times more likely to develop such a disorder themselves. Mental problems (such as anxiety and depression} and personality traits (such as perfectionism, low self-esteem, and a high need for acceptance and achievement) seem to predispose people to eating disorders. Cases often begin during adolescence, when bodies and brains are undergoing rapid changes. Magazines, TV, and Internet ads bombard susceptible young people with the message that being skinny is a route to acceptance, beauty, and riches.
Isabelle Caro was among those who fell victim to an eating disorder (FIG. 35-21). Caro, a French model who died at age 28, had suffered from anorexia since the age of 13. She is best known for her efforts to help raise awareness and help other victims of this disorder by posing nude for billboards in Italy featuring the words: “No—Anorexia.” The year before Caro went public with her battle, the weight of her 5-foot, 4-inch body had dipped to 55 pounds. Determined to fight her disorder, she struggled to make herself eat. Sadly, her efforts came too late for her ravaged body, and she died two years later.
FIGURE 35-21 Anorexia Isabelle Caro two years before her death.
Anorexia and bulimia are difficult to overcome. Victims are given nutritional therapy to help them recover from malnutrition. Psychotherapy is usually necessary, and antidepressant drugs may be helpful. Because many victims hide or deny their problems, and because treatment is expensive, the majority of sufferers are inadequately treated; fewer than half experience complete recovery.
CONSIDER THIS Media and fashion houses that glamorize slimness have been blamed for the prevalence of eating disorders. Why do you think extreme thinness is made so appealing? Are there appropriate measures that a free society can take to reverse or limit this message? Do you support the idea of a minimum BMI for models?
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Chapter 35 Solutions
Biology: Life on Earth with Physiology (11th Edition)
- Biopharmaceutics and Pharmacokinetics:Two-Compartment Model Zero-Order Absorption Questions SHOW ALL WORK, including equation used, variables used and each step to your solution, report your regression lines and axes names (with units if appropriate) :Calculate a-q a) B1, b) B2, c) hybrid rate constant (1) d) hybrid rate constant (2) e) t1/2,dist f) t1/2,elim g) k10 h) k12 i) k21 j) initial concentration (C0) k) central compartment volume (V1) l) steady-state volume (Vss) m) clearance (CL) AUC (0→10 min) using trapezoidal rule n) AUC (20→30 min) using trapezoidal rule o) AUCtail (AUC360→∞) p) total AUC (using short cut method) q) volume from AUC (VAUC)arrow_forwardWhat are some external influences that keep people from making healthy eating decisions?arrow_forwardWhat type of structure(s) would you expect to see in peripheral membrane proteins? (mark all that apply) A. Amphipathic alpha helix (one side is hydrophilic and one side is hydrophobic) B. A hydrophobic beta barrel C. A hydrophobic alpha helix D. A chemical group attached to the protein that can anchor it to the membranearrow_forward
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- You are studying the mobility of a transmembrane protein that contains extracellular domains, one transmembrane domain, and a large cytosolic domain. Under normal conditions, this protein is confined to a particular region of the membrane due to the cortical actin cytoskeletal network. Which of the following changes is most likely to increase mobility of this protein beyond the normal restricted region of the membrane? A. Increased temperature B. Protease cleavage of the extracellular domain of the protein C. Binding to a free-floating extracellular ligand, such as a hormone D. Protease cleavage of the cytosolic domain of the protein E. Aggregation of the protein with other transmembrane proteinsarrow_forwardTopic: Benthic invertebrates as an indicator species for climate change, mapping changes in ecosystems (Historical Analysis & GIS) What objects or events has the team chosen to analyze? How does your team wish to delineate the domain or scale in which these objects or events operate? How does that limited domain facilitate a more feasible research project? What is your understanding of their relationships to other objects and events? Are you excluding other things from consideration which may influence the phenomena you seek to understand? Examples of such exclusions might include certain air-born pollutants; a general class of water bodies near Ottawa, or measurements recorded at other months of the year; interview participants from other organizations that are involved in the development of your central topic or issue. In what ways do your research questions follow as the most appropriate and/or most practical questions (given the circumstances) to pursue to better understand…arrow_forwardThe Esp gene encodes a protein that alters the structure of the insulin receptor on osteoblasts and interferes with the binding of insulin to the receptor. A researcher created a group of osteoblasts with an Esp mutation that prevented the production of a functional Esp product (mutant). The researcher then exposed the mutant strain and a normal strain that expresses Esp to glucose and compared the levels of insulin in the blood near the osteoblasts (Figure 2). Which of the following claims is most consistent with the data shown in Figure 2 ? A Esp expression is necessary to prevent the overproduction of insulin. B Esp protein does not regulate blood-sarrow_forward
- Nutrition: Concepts and Controversies - Standalo...Health & NutritionISBN:9781305627994Author:Frances Sizer, Ellie WhitneyPublisher:Brooks Cole
- Nutrition Through The Life CycleHealth & NutritionISBN:9781337919333Author:Brown, Judith E.Publisher:Cengage Learning,Lifetime Physical Fitness & WellnessHealth & NutritionISBN:9781337677509Author:HOEGERPublisher:Cengage
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