NBC News
Why does eating feel so good? It’s in your head

Appetite hormone acts on pleasure receptors in brain, lab tests show

WASHINGTON - Why does eating feel so good? The secret may lie in the head, not in the stomach, U.S. researchers reported.

Tests on rats show that the appetite hormone ghrelin acts on pleasure receptors in the brain.

The findings may help researchers develop better diet drugs.
"In mice and rats ghrelin triggers the same neurons as delicious food, sexual experience, and many recreational drugs; that is, neurons that provide the sensation of pleasure and the expectation of reward,”the researchers write in Friday’s issue of the Journal of Clinical Investigation.

“These neurons produce dopamine and are located in a region of thebrain known as the ventral tegmental area (VTA),” wrote the researchers,headed by Dr. Tamas Horvath of the Yale University School ofMedicine in Connecticut.

Horvath’s team found that ghrelin, itself only discovered in the last decade, acts on a molecular structure on brain cells called the ghrelinreceptor growth hormone secretagogue 1 receptor or
GHSR for short.

Summary of paragraph 6
acts on a molecular structure on brain cells

What does acts on a molecular structure on brain cells called?

acts on a molecular structure on brain cells called the ghrelinreceptor growth hormone secretagogue 1 receptor or
GHSR for short.

1.molecular=(adj) molecular structure