How to Use norepinephrine in a Sentence

norepinephrine

noun
  • Cole found these men produced more of the hormone norepinephrine—a key driver of our fight-or-flight response.
    — Florence Williams, Wired, 14 Feb. 2022
  • Simply put, the norepinephrine triggers a pump-like effect that pushes fluid around the brain to rinse waste buildup.
    — Margherita Bassi, Smithsonian Magazine, 10 Jan. 2025
  • The first chemical is norepinephrine, which prepares the body and brain for action.
    — Jon Hamilton, NPR, 27 Dec. 2025
  • These drugs increase the levels of dopamine and norepinephrine in the brain by blocking their reuptake.
    — Avery Hurt, Discover Magazine, 22 Mar. 2023
  • Wellbutrin is thought to act on dopamine and norepinephrine, whereas Prozac is believed to act on serotonin.
    — Mary Choy, Verywell Health, 6 Aug. 2024
  • As people fall in love, the brain begins to release the hormones dopamine, norepinephrine, and serotonin.
    — Brandon Keim, WIRED, 16 June 2011
  • The flushed skin, pounding heart and rapid breathing are the fault of norepinephrine and adrenaline kicking on my fight or flight instinct.
    — Christie Wilcox, Discover Magazine, 26 July 2012
  • Wang has long studied norepinephrine because of its role in thinking and complex behaviors.
    — Karen Weintraub, Scientific American, 16 Jan. 2020
  • The team focused on the relationship between norepinephrine and blood flow during deep sleep.
    — Maureen MacKey, Fox News, 11 Jan. 2025
  • The arteries then dilate slowly until the arrival of the next norepinephrine wave.
    — Tom Hawking, Popular Science, 8 Jan. 2025
  • Together, norepinephrine and serotonin account for just a few percentage of the synapses in the brain.
    — Steven Strogatz, Quanta Magazine, 23 May 2024
  • But since the 1970s, it’s been thought that norepinephrine is not involved in this system during certain stages of sleep.
    — Quanta Magazine, 22 Mar. 2022
  • People with sepsis, for instance, had a higher mortality rate when there was a shortage of the drug norepinephrine.
    — Jen Christensen, CNN, 22 Mar. 2023
  • One of the great misconceptions about brain chemistry is that the brain is dominated by norepinephrine and serotonin.
    — Steven Strogatz, Quanta Magazine, 23 May 2024
  • The cells were known to have norepinephrine receptors, but no one knew how the binding of norepinephrine led to the calcium waves.
    — Ingrid Wickelgren, Quanta Magazine, 30 Jan. 2026
  • The hormones epinephrine and norepinephrine play a key role in the response, increasing heart rate and blood pressure.
    — Kelly Servick, Science | AAAS, 12 Sep. 2019
  • The brain send a distress signal, and the hormones adrenaline and cortisol are released, as well as norepinephrine, dopamine.
    — The Editors, Marie Claire, 8 July 2019
  • This drug blocks signaling through receptors in the brainstem for the molecule norepinephrine, which excites our brain.
    — Rj MacKenzie, Popular Science, 3 Sep. 2025
  • But in higher amounts, dopamine and norepinephrine also raise heart rate and blood pressure and activate brain regions involved in threat perception.
    — Lauryn Higgins, Time, 11 Nov. 2025
  • The shock of being blasted by cold water provides a quick, natural high by elevating levels of dopamine and norepinephrine in our brains.
    — Brianna Randall, Discover Magazine, 5 Dec. 2022
  • Tyrosine also helps to produce dopamine and norepinephrine, which many animals secrete in response to stress.
    — Viviane Callier, Scientific American, 1 Sep. 2022
  • The dopamine and norepinephrine must really be flowing this morning, because suddenly Nayte is all in.
    — Kristen Baldwin, EW.com, 15 Dec. 2021
  • Serotonin, dopamine, acetylcholine and norepinephrine are a few neurotransmitters in the body.
    — Avery Hurt, Discover Magazine, 22 Mar. 2023
  • That means the brain releases adrenaline and norepinephrine, and your thinking becomes pessimistic.
    — Caroline Castrillon, Forbes, 10 July 2022
  • Frequent disruptions put us on high alert like a jack-in-the-box, triggering a release of adrenaline, norepinephrine and cortisol.
    — Brittany Harker Martin, Fortune Well, 4 May 2023
  • There, the brain produces norepinephrine, a fight-or-flight chemical that increases alertness and decreases pain and tiredness.
    — Maddie Bender, Scientific American, 10 June 2021
  • Green tea may boost the metabolism by increasing the production of the fat-burning hormone norepinephrine.
    — Norcal Marketing, Chron, 4 Feb. 2021
  • Pert described how neurotransmitters such as dopamine, norepinephrine, and acetylcholine act as a mail system throughout a body and govern its actions.
    — Sally Jenkins, The Atlantic, 21 Feb. 2026
  • Positive thinking also increases the levels of feel-good hormones like serotonin and norepinephrine, which prime the brain to seek more of the same positive vibes.
    — Jamie Kiffel-Alcheh, National Geographic, 4 May 2020
  • These results suggest that sleeping aids that impact norepinephrine production—which includes most sleeping aids—might harm the brain’s waste-removal system.
    — Margherita Bassi, Smithsonian Magazine, 10 Jan. 2025

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'norepinephrine.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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