3927111
Descripción
Test por Woody Payne, actualizado hace más de 1 año
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Creado por Woody Payne
hace más de 8 años
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Pregunta 1
Pregunta
Melatonin exerts its effects by:
Respuesta
-
Acting as an ultradian hormone.
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Acting as an antioxidant.
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Acting upon melatonin receptors.
-
Acting upon adrenergic receptors.
-
Acting to protect mitochondrial and nuclear DNA.
Pregunta 2
Pregunta
Melatonin is produced by which of the following pathways.
Substances:
1.Serotonin
2.Melatonin
3.L-Tryptophan
4.N-Acetyl Serotonin
5.5-HTP
Enzymes:
A.tryptophan 5-hydroxylase
B.acetylserotonin O-methyltransferase
C.AANAT
D.5-HTP decarboxylase
Respuesta
-
1B4D2A3C5
-
3A5D1C4B2
-
3A1C5D4B2
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1B4D3C2A5
Pregunta 3
Pregunta
Bioavailability and Half-Life of Melatonin
Respuesta
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30-50% and 30-50 Minutes.
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40-60% and 20 to 30 Minutes.
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15-25% and 60 to 90 Minutes.
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60-80% and 90 to 120 Minutes.
Pregunta 4
Pregunta
Melatonin is regulated by Norepinephrine by which pathway:
Substance:
1.Norepinephrine
Enzyme:
A.PKA
B.AANAT
Receptor:
a.Beta Adrenergic
Respuesta
-
1aBA
-
Ba1A
-
AB1a
-
1aAB
Pregunta 5
Pregunta
Light of which of the following wavelength criteria will not inhibit melatonin
Respuesta
-
Under 530 nm.
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Over 480 nm.
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Over 530 nm.
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Under 480 nm.
Pregunta 6
Pregunta
Dopamine plays a role in Melatonin secretion by:
Respuesta
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Providing negative feedback to Melatonin formation.
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Upregulating Melatonin receptors.
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Enhancing the effects of Norepinephrine on Melatonin secretion.
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Increasing in response to Melatonin binding with receptors.
Pregunta 7
Pregunta
5HT has which of the following functions and changes:
Respuesta
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It decreases Serotonin production.
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It is decreased by AANAT to be converted to Melatonin.
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It is produced only during the day.
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Its production leads to increased sympathetic activity and receptor activation on the pineal gland, ultimately leading to decreased Melatonin synthesis.
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Dopamine activation of the D4 receptor heteromeres decreases 5HT in the morning.
Pregunta 8
Pregunta
The Pineal Gland is located outside of the blood brain barrier.
Respuesta
- True
- False
Pregunta 9
Pregunta
Melatonin affects the following hormones by:
Respuesta
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Increasing LH.
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Decreasing FSH.
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Decreasing Leptin.
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Increasing Prolactin and Cytokines.
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Decreasing Corticosterone.
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