13 Questions
| Attempts: 362

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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