Summarize what is currently know about the role of genetics and neurophysiology in eating disorders
Answer:
Concordance rates for bulimia are higher for monozygotic twins than for dizygotic twins. However, the difference can be explained by several different heritable mechanisms. Eating disorders are unlikely to be directly inherited. Genetics may influence personality characteristic that lead to bulimia, or a certain body type or weight set point may be inherited. Genes clearly affect weight and body type, but we cannot mindlessly conclude that eating disorders are genetic without carefully considering genetic mechanisms and gene-environment interactions. In rare instances, a hormonal disturbance or a lesion in the hypothalamus has been linked to eating disorders.
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After visual input has been processed in the primary visual cortex, signals are processed further along a number of pathways. Information about form and color is processed by the
a. ventral stream. b. dorsal stream. c. medial stream. d. lateral stream.
Sandy asked Professor Alperson how decreased volumes in cortical structures and enlarged ventricles predispose a person to schizophrenia. Having read the recent research, Professor Alperson says, ____
a. "They reduce dopamine activity in the brain by blocking dopamine receptor sites in post-synaptic neurons." b. "They increase the availability of dopamine and norepinephrine in the brain and increase the severity of the symptoms." c. "They may create subconnections between different brain regions, thereby overloading neural circuitry." d. "They may result in weak or aberrant connections between the different brain regions, leading to reductions in the integrative function of the brain."
Most nerve cell fibers outside the brain and spinal cord are wrapped by a thin layer of cells that aid in the repair of neurons. This thin layer of cells is called
a. myelin. b. neurilemma. c. acetylcholine. d. endorphins.
Approximately what percentage of U.S. adults reports being "absolutely certain" of the existence of God or a similar spiritual entity?
A. 75% B. 25% C. 50% D. 90%