Sodium channels form receptors that play a key role in the perception of __________.
A. acids
B. umami
C. salts
D. sugars
Answer: C
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A researcher conducts a hypothesis test using a sample from an unknown population. If the t statistic has df = 30, how many individuals were in the sample?
a. n = 29 b. n = 30 c. n = 31 d. Cannot be determined from the information given
Which factor seems to be most involved in timing of menarche in many industrialized nations over the past 150 years?
a. Parenting skills b. Nutrition c. Education d. Genetics
Covert reinforcement is
a. more effective than direct reinforcement for most people. b. a procedure that involves imagining a pleasant, reinforcing scene. c. a procedure that involves imagining disgusting images. d. not an effective method.
Biological factors appear to play a role in anxiety disorders as research finds
a. they tend to run in families. b. people with these disorders may be cognitively biased to focus on threats. c. children tend to imitate the anxieties and fears of their parents. d. a and c