Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential. This indicates that a neuron's reaction is
A) inhibited by the myelin sheath.
B) delayed by the refractory period.
C) an all-or-none response.
D) dependent on neurotransmitter molecules.
E) primarily electrical rather than chemical.
Answer: C) an all-or-none response.
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Hopi children who spend their first year strapped to a cradleboard
a. are usually at least one year behind in learning to walk. b. walk sooner than children from other cultures. c. may never learn to walk. d. learn to walk at about the same time as children from other cultures.
Ali is being treated for a shoe fetish. The therapist pairs electric shock with the sight and touch of shoes. The therapist also is teaching Ali to engage in appropriate social skills and how to feel sexual pleasure without resorting to shoes. The therapist probably supports which approach to treatment?
a. behavioral c. biogenic b. psychodynamic d. cognitive