We need to use caution when drawing conclusions from family and twin studies of schizophrenia, because
a. researchers study only their own families
b. individuals with schizophrenia are often taken away from their families
c. when people share environments as well as genes, it is difficult to separate the influences of each
d. none of these
Ans: c. when people share environments as well as genes, it is difficult to separate the influences of each
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Based only on the process of neurotransmitter release, which of the following types of neuron is different from the rest?
a. photoreceptors b. inner hair cells c. mechanoreceptors d. vestibular hair cells
Females are less likely than males to show sex-linked disorders because females
a. have higher levels of estrogen. b. do not inherit recessive genes. c. have an additional X chromosome. d. have higher levels of testosterone.