2014 exam Flashcards
(126 cards)
In which structure are the stimulatory and inhibitory hormones of the hypothalamus secreted?
a. Pars distalis
b. Pars nervosa
c. Median eminence
d. Pars tuberalis
c. Median eminence
Which of the following cells of pituitary is acidophilic?
a. Luetotrphs
b. Somatotrophs
c. Corticotrphs
d. Thyrotrophs
b. Somatotrophs
A patient suffering from a tumor that enlarged started growing anteriorly and superiorly which structure would be affected?
a. Sphenoidal air sinus
b. Cavernous sinus
c. Optic chiasm
d. Abducent nerve
c. Optic chiasm
In case of pressure by a tumor on the optic chiasm what is the patient more likely to suffer from?
a. Bilateral peripheral loss of vision
b. Bilateral medial loss of vision
a. Bilateral peripheral loss of vision
If the hypothalamic regulation to the pituitary is disrupted which of the following hormone will increase?
a. Growth hormone
b. ACTH
c. TSH
d. Prolactin
e. LH
d. Prolactin
A woman gave birth 6 months ago, she presented to the outpatient clinic complaining of amenorrhea, and unable to breast feed. Upon further investigations, the doctor found out that she had severe hemorrhage during pregnancy which required blood transfusion, what is she most likely suffering from?
a. Frohlich’s syndrome
b. Sheehan syndrome
c. Cushing syndrome
b. Sheehan syndrome
What is the importance of the chromaffin granule in the adrenal medulla?
a. Stores epinephrine and encephalin
b. The rate limiting enzyme for the synthesis of epinephrine is within the granules
c. Responsible for the degradation of excessive dopamine
a. Stores epinephrine and encephalin
encephalin= pentapeptide involved in regulating nociception in the body
Which of the following hormones acts on uterine smooth muscle contraction and the myoepithelial cells for the breast?
a. Luteinizing hormone
b. Oxytocin
c. Follicular stimulating hormone
d. ACTH
b. Oxytocin
Which of the following is used for the diagnosis of (primary) adrenal insufficiency?
a. Cortisol
b. Cosyntropin
c. CRH
b. Cosyntropin
the auto antigen responsible for the autoimmunity in lymphocytic hypophysitis is?
a. Alpha enolase
b. Piturary gland specifc factor 1a
c. Pituraty gland specifc factor 2
d. Human growth hormone
a. Alpha enolase
In case of high avidity self-antigen recognition by B cells what is the mechanism that results in new immunoglobulins light chains on the B cell surface?
a. Anergy
b. Apoptosis
c. Receptor editing
d. Regulation by inhibiting receptors
c. Receptor editing
Failure in what will result in autoimmune diseases?
Tolerance
Loss of the function of which of the following cell lines result in IPEX syndrome?
a. Macrophages
b. CD8+ lymphocytes
c. B cells
d. Regulatory lymphocytes
d. Regulatory lymphocytes
Which of the following act by negative feedback long loop on the hypothalamus?
a. Cortisol
b. TSH
a. Cortisol
Which of the following act through short loop feedback to inhibit TRH in the hypothalamus?
a. Thyroxin
b. ACTH
c. LH
d. TSH
d. TSH
What is the most common type of pituitary tumor?
a. Glioma
b. Null cell adenoma
c. Atypical adenoma
d. Pituitary carcinoma
e. Rathke’s cleft cyst
f. Craniopharyngioma
g. Prolactinoma
h. GH secreting tumor
g. Prolactinoma
What indicates that the hypopituitarism is a result from dysfunction/ damage in the hypothalamus?
Diabetes insipidus
Which of the following is lined by columnar epithelium with goblet cells?
a. Craniopharyngioma
b. Rathke’s cleft cyst
c. Atypical adenoma
b. Rathke’s cleft cyst
A patient presented with acromegaly was treated with cabergoline, what is the mechanism of action of this drug?
a. Act as an agonist of somatostatin
b. Acts as D2 agonist
c. Act as GH receptor antagonist
b. Acts as D2 agonist
What is the mechanism of action of desmopressin?
a. Decrease V2 receptor sensitivity
b. Blocks V2 receptor
c. Increase expression of Aquaporins
c. Increase expression of Aquaporins (water channels)
Causes gynecomastia in males, galactorrhea and amenorrhea in females. What drug can lead to this as a side effect?
a. Chlorpromazine
b. Leuprolide
c. Menotropin
a. Chlorpromazine
If a patient was treated successfully from diabetes insipidus what is the most likely finding in this patient?
a. His blood pressure will be normal
b. Urine production will be reduced by 30%
c. The urine production will be 5ml/min
d. The urine osmolality increased by 100-200
a. His blood pressure will be normal
What is true regarding diabetes insipidus?
a. There is always psychogenic polydipsia
b. There may be normal sodium levels
c. Central DI with increased ADH
d. Central DI is caused by kidney problem
b. There may be normal sodium levels
In radioimmunoassay if the displacement of the antibodies is low after adding a sample of plasma what does it indicate?
a. Indicates excessive radioactivity
b. Low levels of hormone in the plasma sample
c. High levels of hormone in the plasma sample
b. Low levels of hormone in the plasma sample