The __________ cells are the most important support cells of the central nervous system.

How does the prevalence of anxiety disorders among the elderly compare to the prevalence among other age groups?

a. The prevalence rate is lower among the elderly. b. The highest prevalence rates are found among the elderly. c. The prevalence rates are virtually identical across the life span. d. Whether the rates are high or low depends on both age and gender.

_________ people who have paraphilic disorders are men.

a. about half the b. almost all c. very few d. all