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Adrenergic Neurons: Neurotransmission01:27

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Postganglionic sympathetic fibers (except those supplying the sweat glands) releasing noradrenaline or norepinephrine are called noradrenergic or adrenergic neurons. Noradrenaline, dopamine, adrenaline, or epinephrine are collectively called "catecholamines" as they contain a catechol moiety and an amine side chain. The five stages of neurotransmitter release involve their synthesis, storage, release, reuptake and metabolism.
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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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Adrenergic Receptors: β Subtype01:26

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β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
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Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
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Thermosensation01:43

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Related Experiment Video

Updated: Oct 16, 2025

Optogenetic Activation of Intrinsic Cardiac Autonomic Neurons in Excised Perfused Mouse Hearts
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Norepinephrine exhibits thermo-optical nonlinearity under physiological conditions.

Sakshi1, Bikash Chandra Swain1, Anand Kant Das2

  • 1Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, 826004, India. utripathy@iitism.ac.in.

Physical Chemistry Chemical Physics : PCCP
|October 18, 2021
PubMed
Summary

Norepinephrine, a key neurotransmitter, shows thermo-optical nonlinearity under physiological conditions. This finding aids in studying noradrenergic processes and related diseases.

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Area of Science:

  • Neuroscience
  • Biophysics
  • Optical Physics

Background:

  • Norepinephrine (NE) is a vital neurotransmitter influencing human physiology.
  • Understanding NE's physical properties is crucial for biological and medical research.

Purpose of the Study:

  • To investigate the nonlinear optical properties of Norepinephrine (NE).
  • To explore NE's behavior under physiological conditions using advanced optical techniques.

Main Methods:

  • Utilized the Z-scan technique, a standard method for measuring nonlinear optical properties.
  • Conducted experiments under conditions mimicking physiological environments.

Main Results:

  • Norepinephrine (NE) demonstrated significant thermo-optical nonlinearity.
  • The study quantified NE's nonlinear optical response.

Conclusions:

  • NE possesses thermo-optical nonlinear properties relevant to its physiological function.
  • These findings offer novel avenues for investigating noradrenergic processes and their links to various diseases.