Laboratory Measurement Of Prolactin

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Laboratory Measurement Of Prolactin - Quiz

You have 20 mins to answer all questions. Please choose one answer from each of the following questions.


Questions and Answers
  • 1. 
    Which one of the following hormones would increase in response to dehydration?
    • A. 

      Anti-diuretic hormone

    • B. 

      Oxytocin

    • C. 

      Thyrotropin-releasing hormone

    • D. 

      Adrenocorticotropic hormone

  • 2. 
    The ________________ half of the pituitary gland is of neural origin and is an extension of the brain.
    • A. 

      Anterior

    • B. 

      Posterior

  • 3. 
    Which of the following hormones is not released into the hypothalamic-pituitary portal system?
    • A. 

      Growth hormone-releasing hormone

    • B. 

      Prolactin-releasing peptide

    • C. 

      Adrenocorticotropic hormone

    • D. 

      Thyrotropin-releasing hormone

  • 4. 
    Prolactin is mainly secreted by the ______________ pituitary gland.
    • A. 

      Posterior

    • B. 

      Anterior

  • 5. 
    Which of the following is not a function of prolactin?
    • A. 

      Stimulate breast development and milk production in females

    • B. 

      Maintains corpus luteum during pregnancy

    • C. 

      Involved in testicular function in males

    • D. 

      Stimulate the ovary by promoting FSH and LH production

  • 6. 
    There are _____ major variants of circulating prolactin.
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 7. 
    Which is the biologically active form of prolactin variant?
    • A. 

      Monomeric prolactin

    • B. 

      Big prolactin

    • C. 

      Big-big prolactin

  • 8. 
    What does the gel filtration result show? 
    • A. 

      The sample consists of mainly monomeric prolactin.

    • B. 

      The sample consists of mainly big prolactin.

    • C. 

      The sample consists of mainly big-big prolactin.

    • D. 

      The results indicates that the patient is hyperprolactinemic.

  • 9. 
    Which of the following is not a symptom of hyperprolactinemia in females?
    • A. 

      Anovulation

    • B. 

      Irregular period

    • C. 

      Amenorrhoea

    • D. 

      Fever

    • E. 

      Headache

  • 10. 
    All the following are common causes of hyperprolactinemia EXCEPT 
    • A. 

      Benign pituitary tumour - prolactinoma

    • B. 

      Dopomine antagonist drugs

    • C. 

      Primary hypothyroidism

    • D. 

      Primary hyperthyroidism

  • 11. 
    What is the protocol used for prolactin PEG screening?
    • A. 

      Mixed equal volume of (25% w/v) PEG with serum. Centrifuged the mixture at 14000 rcf for 10 mins.

    • B. 

      Mixed equal volume of (50% w/v) PEG with serum. Centrifuged the mixture at 14000 rcf for 10 mins.

    • C. 

      Mixed equal volume of (25% w/v) PEG with serum. Centrifuged the mixture at 14000 rpm for 10 mins.

    • D. 

      Mixed equal volume of (25% w/v) PEG with serum. Centrifuged the mixture at 14000 rcf for 5 mins.

  • 12. 
    The prolactin-PEG result must be multiplied by 2 in order to obtain to final concentration.
    • A. 

      True

    • B. 

      False

  • 13. 
    Reflex testing will be performed on all prolactin cases.
    • A. 

      True

    • B. 

      False

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