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Which of the following chemical substances are authenticated as Neurotransmitters? (a) Acetylcholine and Gamma-aminobutyric acid (b) Dopamine and noradrenalin (c) Lysine and Histamine (d) Pyruvic acid and Acetyl CoA 

Which of the following chemical substances are authenticated as Neurotransmitters? (a) Acetylcholine and Gamma-aminobutyric acid (b) Dopamine and noradrenalin (c) Lysine and Histamine (d) Pyruvic acid and Acetyl CoA  Correct Answer (a) and (b)

The correct answer is (a) and (b).

Key Points

Neurotransmitters -

  • Neurotransmitters are also called chemical transmitters or chemical messenger.
  • It is any group of chemical agents released by neurons (nerve cells) to stimulate neighbouring neurons or muscle or gland cells.
  • Thus allowing impulses to be passed from one cell to the next throughout the nervous system.
  • Different types of neurotransmitters have been identified.
  • Based on chemical and molecular properties, the major classes of neurotransmitters include amino acids, such as glutamate and glycine, monoamines, such as dopamine and norepinephrine, peptides, such as somatostatin and opioids, and purines, such as adenosine triphosphate (ATP).
  • Some gaseous substances, such as nitric oxide, can also act as neurotransmitters, as can endogenous substances are known as trace amines, which are related chemically to the monoamines; examples include tryptamine and phenethylamines.
  • Acetylcholine, a substance synthesized by neurons, is the primary neurotransmitter of the parasympathetic nervous system.
  • Which controls smooth muscle contraction and blood vessel dilation and slows the heart rate.
  • The major inhibitory neurotransmitter of the nervous system is GABA (gamma-aminobutyric acid), which acts to dampen neuronal activity.

  • Acetylcholine, Gamma-aminobutyric acid, Dopamine and noradrenalin are the chemical substances that are authenticated as Neurotransmitters. Hence the correct answer is option 3.

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