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Quiz

Melatonin

Woody Payne 9 perguntas

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Perguntas do quiz (9)

  1. 1Melatonin exerts its effects by:
    1. AActing as an ultradian hormone.
    2. BActing as an antioxidant.
    3. CActing upon melatonin receptors.
    4. DActing upon adrenergic receptors.
    5. EActing to protect mitochondrial and nuclear DNA.
  2. 2Melatonin 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
    1. A1B4D2A3C5
    2. B3A5D1C4B2
    3. C3A1C5D4B2
    4. D1B4D3C2A5
  3. 3Bioavailability and Half-Life of Melatonin
    1. A30-50% and 30-50 Minutes.
    2. B40-60% and 20 to 30 Minutes.
    3. C15-25% and 60 to 90 Minutes.
    4. D60-80% and 90 to 120 Minutes.
  4. 4Melatonin is regulated by Norepinephrine by which pathway:

    Substance:
    1.Norepinephrine

    Enzyme:
    A.PKA
    B.AANAT

    Receptor:
    a.Beta Adrenergic
    1. A1aBA
    2. BBa1A
    3. CAB1a
    4. D1aAB
  5. 5Light of which of the following wavelength criteria will not inhibit melatonin
    1. AUnder 530 nm.
    2. BOver 480 nm.
    3. COver 530 nm.
    4. DUnder 480 nm.
  6. 6Dopamine plays a role in Melatonin secretion by:
    1. AProviding negative feedback to Melatonin formation.
    2. BUpregulating Melatonin receptors.
    3. CEnhancing the effects of Norepinephrine on Melatonin secretion.
    4. DIncreasing in response to Melatonin binding with receptors.
  7. 75HT has which of the following functions and changes:
    1. AIt decreases Serotonin production.
    2. BIt is decreased by AANAT to be converted to Melatonin.
    3. CIt is produced only during the day.
    4. DIts production leads to increased sympathetic activity and receptor activation on the pineal gland, ultimately leading to decreased Melatonin synthesis.
    5. EDopamine activation of the D4 receptor heteromeres decreases 5HT in the morning.
  8. 8The Pineal Gland is located outside of the blood brain barrier.
    1. AVerdadeiro
    2. BFalso
  9. 9Melatonin affects the following hormones by:
    1. AIncreasing LH.
    2. BDecreasing FSH.
    3. CDecreasing Leptin.
    4. DIncreasing Prolactin and Cytokines.
    5. EDecreasing Corticosterone.

Informações

Descrição
Subcategory of Circadian Endocrinology
Idioma
English
Visualizações
65
Etiquetas
melatonin
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