Describe how the reticular formation regulates muscle tonus
What will be an ideal response?
Answer: The reticular formation controls the activity of the gamma motor system, which in turn controls the activity of the intrafusal muscle fibers; activation of these fibers will cause the extrafusal fibers to show more overall contractions. The reticular formation can thus indirectly increase or decrease overall muscle tone.
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Regarding the psychodynamic therapy used today, which of the following statements is FALSE?
a. More direct questioning is used to reveal unconscious conflicts. b. Therapists today actively provoke emotional reactions, which lower defenses and provide insights. c. Today's psychodynamic therapy requires more sessions per week over a longer time period than the traditional psychoanalysis. d. Today's psychodynamic therapy has been shown to accelerate recovery.
What role do free radicals play in aging?
a. They damage body organs and DNA. b. They can reduce the impact of proteins on body organs and DNA. c. They decrease body fat. d. They cause anti-oxidants to be produced.