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The endothelium releases local chemicals called endothelins that can do what to smooth muscle?
ADuplicate it
BFreeze it
CConstrict it
DDissolve it
Answer & Solution
Correct answer: C. Constrict it
1. The vessel lining can act on the vessel wall.
2. The endothelium lines the inside of a vessel.
3. It releases local chemicals called endothelins.
4. These can constrict the smooth muscle within the walls of the vessel.
_Source: OpenStax Anatomy and Physiology 2e (CC BY 4.0), Ch 20 'The Cardiovascular System: Blood Vessels and Circulation', sections 20.1-20.5_
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