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A powerful vasoconstrictor is a substance that causes blood vessels to narrow, increasing blood pressure. One of the most well-known vasoconstrictors is norepinephrine, a neurotransmitter and hormone that plays a critical role in the body's fight-or-flight response. Other examples include angiotensin II and endothelin-1, which are involved in regulating vascular tone and blood pressure. These substances are important in various physiological processes and can also be implicated in certain medical conditions.

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1mo ago

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