Many axons, especially the larger ones, are insulated with a myelin sheath. What kind of cells make up the myelin sheath? What does the myelin sheath look like? What are two purposes of the myelin sheath?
What are two purposes of the myelin sheath? What happens when a person experiences the loss of myelin?
What will be an ideal response?
A good answer will include the following key points:
• Myelin is a fatty sheath formed by glial cells.
• It occurs in segments along the axon and looks like a string of link sausages.
• Its key functions are to prevent signals in adjacent cells from interfering with each other and to speed up conduction of neural impulses.
• In individuals with multiple sclerosis, loss of myelin causes erratic nerve signals resulting in things like loss of sensation, muscle weakness or paralysis, lack of coordination, or vision problems.
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According to research on self-efficacy by Holzberger, Philipp, & Kunter, 2013, which of the following statements is true about how self-efficacy affects academic performance?
a. In high-achieving schools, policies and regulations are implemented strictly to enforce discipline. c. Levels of self-efficacy of classroom teachers and ratings of the teachers by students mutually affect each other. b. Students in the East German collectivist culture scored higher in self-efficacy than those in the West German individualist culture. d. In low-achieving schools, teachers tend to cultivate self-efficacy among students by giving them achievable goals.
The result of greater public awareness about testing is
a. complete public support for testing. b. a reduction of the safeguards in relationship to human rights. c. that the public is ambivalent about psychological testing. d. a reduced demand for testing services.
Who created the field of cybernetics?
a. Norbert Wiener b. Claude Shannon c. George Miller d. Herbert Simon
Gifted children ____ at analogical reasoning
a. do poorly b. perform at an average level c. perform impressively well d. do well