Question

Placebo pills and acupuncture have both been effective in reducing pain. the common element in both of these methods may be their ability to stimulate the ________.

Answer 1

Answer

               Placebo pills and acupuncture have both been effective in reducing pain. the common element in both of these methods may be their ability to stimulate the release of endorphins.

this is the commonality between placebo pills and acupuncture.

Answer 2

The given blank can be filled with the production of endorphins.

The endorphins are the hormones, which are responsible for the activation of the opiate receptors in the body. They are the natural pain killers. The activation of the opiate receptors causes the analgesic effects on the body.  

These endorphins are secreted in the brain and the nervous system. The effect of the endorphins is similar to that of the morphine.