Synaptic pruning means that unused __________ is(are) being removed in the brain
a) myelin
b) dendrites
c) axons
d) neurons
Answer: d
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Bonnie Beanpole's relatives are tall. She is now 6'4" and towers over her high school classmates. Bonnie seeks the company of tall men in the basketball club. This shows a(n) ____ genotype/environment correlation
a. active (niche-building) b. negative eugenic c. passive d. evocative
Behavior geneticists study the influence of genotype on human behavior by
a. examining karyotypes of unrelated individuals. b. conducting gene replacement experiments. c. studying similarities among family members. d. conducting selective-breeding experiments.
The function of the neuron's axon is to _________
a) carry messages to other neurons b) regulate the neuron's life processes c) receive messages from neighboring neurons d) insulate against leakage of electrical impulses
A scan shows that a particular substance has spread throughout Xiao Ling's body via the bloodstream but has not entered her brain. This finding demonstrates the existence of
A. the blood-brain barrier. B. the doctrine of specific nerve energies. C. blood efficacy. D. medicine effects.