Tyra is weighing the personal advantages and disadvantages of retaliating with violence against her friend Banks, who just called her a "fat pig.". According to Dodge's social information-processing model, Tyra is engaging in

Which of the following statements about the motor system is true

a. the medial motor tracts are associated with dexterous movements b. a drug that inhibits acetylcholinesterase, the enzyme that degrades acetylcholine, would inhibit muscle contraction c. stretch of the sensory dendrites within the muscle spindle result in opening of mechanically-gated sodium channels, depolarizing the sensory neuron d. intrafusal fibers are responsible for the majority of the muscle's contraction

Several studies have shown that heritability estimates for some cognitive skills ____________ with age

A) decrease B) are not correlated with C) increase D) first increase, and then decrease