​Correlational studies are a type of

A) ​experimental study.
B) ​double-blind study.
C) ​ex post facto design.
D) ​descriptive research.

The randomized, clinical trial is a type of retrospective study.

Current evidence for a link between alcohol consumption and breast cancer is​

A) ​convincing, as studies show higher consumption causes higher risk.
B) ​strong, because all studies are showing a causal relationship.
C) ​weak, because most studies are showing no connection.
D) ​nonexistent, because no studies have yet investigated any relationship.

The influences of environmental and social pressures on health behavior are accounted for better by

A) self-efficacy theory.
B) the health belief model.
C) the theory of planned behavior.
D) all of these theories/models equally.

​According to traditional Chinese medicine, when the qi is blocked or becomes stagnant,

A) ​health impairment occurs.
B) ​people lose weight.
C) ​an increase in creativity occurs.
D) ​lung capacity increases but digestive capacity decreases.

Which of the body's own neurochemicals does NOT have opiate-like effects?

A) Bradykinin
B) Enkephalins
C) Endorphins
D) Dynorphin