9

Set 2: Command of Evidence (Intermediate)

Explanation

Answer: A

PASSAGE

The placebo effect occurs when a patient experiences real improvements after receiving an inert treatment (like a sugar pill) because they believe it will work. Brain imaging shows that placebos can trigger the release of endorphins, the body's natural painkillers. This suggests the mind plays a significant role in physical health.

What does the brain imaging evidence reveal about placebos?

A. Placebos have no physical effects on the body.✓ Correct
B. Belief can trigger real physiological changes, like endorphin release.
C. Only pharmaceutical drugs can release endorphins.
D. The placebo effect is purely psychological with no physical basis.

Detailed Explanation

The text says 'placebos can trigger the release of endorphins. ' Endorphin release is a physical/physiological change triggered by belief.

Key Evidence:

• "placebos can trigger the release of endorphins"

Why others are wrong: A (Endorphin release IS a physical effect.), C (Placebos (not drugs) triggered endorphins.), D (Endorphin release proves there IS a physical basis.).

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