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Questions and Answers
Which of the following is the most common inhibitory neurotransmitter in the central nervous system?
Which of the following is the most common inhibitory neurotransmitter in the central nervous system?
- Serotonin
- Glutamate
- Dopamine
- GABA (correct)
Which class of neurotransmitters is synthesized from a single amino acid and tends to have more diffuse effects?
Which class of neurotransmitters is synthesized from a single amino acid and tends to have more diffuse effects?
- Amino acids
- Indolamines
- Catecholamines
- Monoamines (correct)
Which neurotransmitters are catecholamines?
Which neurotransmitters are catecholamines?
- Dopamine, norepinephrine, and epinephrine (correct)
- Serotonin
- Glutamate and GABA
- Amino acids
Which amino acid is converted to l-dopa, which is then converted to dopamine?
Which amino acid is converted to l-dopa, which is then converted to dopamine?
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Which amino acid is serotonin synthesized from?
Which amino acid is serotonin synthesized from?
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Study Notes
- Amino acids are the most common neurotransmitters in the central nervous system.
- Glutamate is the most prevalent excitatory neurotransmitter, while GABA is the most prevalent inhibitory neurotransmitter.
- Monoamines are another class of neurotransmitters that are slightly larger than amino acid neurotransmitters.
- Monoamines are synthesized from a single amino acid and tend to have more diffuse effects.
- There are four monoamine neurotransmitters: dopamine, epinephrine, norepinephrine, and serotonin.
- Dopamine, norepinephrine, and epinephrine are catecholamines, while serotonin is an indolamine.
- Noradrenergic neurons release norepinephrine, while adrenergic neurons release epinephrine.
- Tyrosine is converted to l-dopa, which is then converted to dopamine.
- Neurons that release norepinephrine have an extra enzyme that converts dopamine to norepinephrine.
- Serotonin is synthesized from the amino acid tryptophan.
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