The membrane voltage level at which an action potential is triggered is termed the __________.

Dr. Limmex is trying to win FDA approval for a new drug to treat anxiety. Dr. Limmex claims that 14% of the people who took this new drug reported reduced anxiety; however, other researchers claim that 14% of patients who receive no treatment also report reductions in their anxiety levels. It appears that the patients who improved after taking Dr. Limmex's drug

a. had a self-report bias. b. may have been experiencing placebo effects. c. were a non-representative sample. d. should have been placed in the control group, rather than the experimental group.

The heritability of attention deficit/hyperactivity disorder (ADHD) is _________

a. less than 10 percent b. between 20 and 40 percent. c. between 40 and 60 percent. d. 70 percent or higher.