The principal function of myelin is
a. to carry messages away from the soma.
b. to insulate axons from each other.
c. to regulate the rate at which an axon fires.
d. to control the metabolism of the neuron.
e. to enhance reuptake of neurotransmittes.
b. to insulate axons from each other.
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What is the main advantage of the guilty-knowledge test over the usual polygraph test? a. The guilty-knowledge test identifies a higher percentage of liars
b. The guilty-knowledge test almost never classifies honest people as liars. c. The guilty-knowledge test can be conducted by interrogators with no training. d. The guilty-knowledge test does not require expensive equipment.
Cigarette smokers are _______ times more likely to die of lung cancer than those who have never smoked
A) ?10.9 B) ?24.9 C) ?50 D) ?67.2
Research that is conducted to enhance our understanding of behavior without regard for the immediate application of this knowledge is
a. descriptive research b. applied research c. basic research d. empirical research e. conceptual research
In an analysis of variance, if the within-groups variance estimate is about the same as the between-groups variance estimate, then
A) the null hypothesis should be rejected. B) any difference between sample means is probably due to random sampling error. C) an error has been made in computing the between-groups and the within-groups variance estimates. D) any difference between sample means is probably due to a real difference caused by experimental conditions.