orexin
1
9.3
- noun
- /ɔˈrɛksɪn/
- Specialized
- After studying orexin, scientists learned how it influences appetite and energy levels.
- orexin neurons
- hormone called orexin
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Watch on YouTubeAnd there's a new class of drugs that we've spoken about in a previous episode called the Doras, the dual orexin receptor antagonists Dora small S.
- And there's a new class of drugs that we've spoken about in a previous episode called the Doras, the dual orexin receptor antagonists Dora small S.
- First, once again, coming back to orexin rather than erexin.
Examples
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Orexin is important for maintaining wakefulness and alertness during the day.
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First, once again, coming back to orexin rather than erexin.
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The researchers discovered that orexin plays a crucial role in regulating sleep and hunger.
Surface Forms
Morphology
orexin = orex + in
Formed from a Greek scientific combining form ('orex-') plus the protein suffix '-in'; the root is not a standalone English word and the term is a technical name, so an average learner cannot derive its meaning from the parts.
Etymology
The word orexin comes from the Greek root orexis, meaning 'appetite', and scientists named it because this brain hormone helps control hunger and keeps you awake. You can see the same root in anorexia ('a-' meaning 'without'), so orexin is a brain chemical that affects 'appetite' and wakefulness.