In an experiment to test the effects of a new pain killing drug, the control group was given a placebo, which initially reduced the pain experienced by the participants in the control group because taking the placebo______ of the control group participants.
A)raised the endorphin levels
B)lowered the endorphin levels
C)activated the neurilemma in the receptor sites
D)deactivated the neurilemma in the receptor sites

Question

Quizplus · Accepted Answer

Placebos have been shown to increase activity in the brain's reward system, which includes the release of endorphins. Endorphins are natural painkillers produced by the body, so if the control group experiences a reduction in pain, it is likely due to an increase in endorphin levels caused by taking the placebo.

In an Experiment to Test the Effects of a New