Endocrinology Flashcards
(244 cards)
Which of the following connections are consistent with the principle of positive feedback:
a. T3 – TSH
b. Estradiol – LH
c. Ca – PTH
d. Plasma osmolality – AVP
e. cortisol – ACTH
b. Estradiol – LH
If the hormone travels from the place of creation to the place of action through the lumen of a
hollow organ, this action is called
a. autocrine
b. paracrine
c.lumocrina
d. neuroendocrine
e. classic
c.lumocrina
The following applies to the plasma transfer of hormones:
a. steroid hormones are water soluble and do not require binding to plasma
proteins
b.steroid hormones are not water soluble and require binding to plasma
proteins
c.protein-bound hormone cannot enter the cell and is biologically inactive
d.most peptide hormones are water soluble
e.binding proteins can be specific or nonspecific
b.steroid hormones are not water soluble and require binding to plasma
proteins
c.protein-bound hormone cannot enter the cell and is biologically inactive
d.most peptide hormones are water soluble
e.binding proteins can be specific or nonspecific
Among eicosanoids which doesn’t belongs to them:
a. prostaglandins
b. prostacyclin
c.interleukin
d. leukotriene
e. thromboxane
c.interleukin
Scintigraphy with marked octreotide (octreoscan) is mainly used in diagnostics:
a. Hyperparathyroidism
b. Hypoglycemia
c.Neuroendocrine tumors
d. Osteoporosis
e. Goiters
c.Neuroendocrine tumors
The following statements apply to the synthesis of hormones,except:
a. Peptide hormones are synthesized on ribosomes by translation from specific mRNAs in the
form of preprohormones, which become active after appropriate cleavage of parts of the
molecule
b. Steroid hormones are made from cholesterol, which is first converted into pregnenolone
c. Steroid hormones accumulate in the cells where they are produced and are released only upon a
certain stimulus
d. Most of the steps in steroid synthesis are catalyzed by cytochrome 450 and
dehydrogenase enzymes
e. Nitric oxide (NO) is produced from L-arginine in endothelium, nerve fibers and
macrophages
c. Steroid hormones accumulate in the cells where they are produced and are released only upon a certain stimulus
The hormone travels through the intercellular space - this type of secretion is called:
a.paracrine
b.autocrine
c. classic
d. neurocrine
e. lumocrina
a.paracrine
Prostaglandins are eicosanoids. Choose one answer:
a. True
b. It’s not true
a. True
ACTH and cortisol are examples of hormones that work according to the principle of positive
feedback
a. True
b. It’s not true
b. It’s not true
Which of the complications of long-term glucocorticoid treatment can be prevented
or mitigated by preventive measures?
a. stunted growth in children
b.peptic ulcer
c.osteoporosis
d. inhibition of the pituitary-adrenal axis
e. diabetes
b.peptic ulcer
c.osteoporosis
Side effects of dopamine agonists:
a.Swelling of the nasal mucosa
b.Psychosis
c.Nausea and vomiting
d.Constipation
e.Orthostatic hypotension
All of them
For the hypothalamus the following statement is NOT true:
a. It forms a connection between the CNS and the endocrine regulatory system
b. It consists of the nuclei of neuroendocrine cells
c.The median eminence lies in the uppermost part of the hypothalamus
d. In the hypothalamus there are centers for thirst, satiety, hunger and heat regulation
e. There is a biological clock in the hypothalamus
c.The median eminence lies in the uppermost part of the hypothalamus
Which of the following hormones mainly is not produced in the hypothalamus?
a. Gonadoliberin (GnRH)
b. Oxytocin
c. Somatostatin (STH)
d.Adrenocorticotropin
e. Adiuretin (ADH = vasopressin)
d.Adrenocorticotropin (ACTH)
The diagnosis of syndrome of inadequate secretion of ADH is made with the following…
a.Excessive urinary sodium excretion (>20, often >40 mmol/l)
b.Hyponatremia with correspondingly reduced plasma osmolality
c. The patient is clinically hypovolaemic: orthostasis, tachycardia, decreased skin turgor, dried
mucous membranes
d.Normal functioning of the kidneys, thyroid and adrenal cortex, the patient
has not recently received diuretics
e.Urine osmolality is inappropriately high
a.Excessive urinary sodium excretion (>20, often >40 mmol/l)
b.Hyponatremia with correspondingly reduced plasma osmolality
d.Normal functioning of the kidneys, thyroid and adrenal cortex, the patient
has not recently received diuretics
e.Urine osmolality is inappropriately high
–> The patient is euvolemic
Which statement about the regulation of hypothalamic and pituitary hormones is NOT correct:
a. Thyroliberin (TRH) stimulates prolactin secretion
b. Thyroliberin (TRH) stimulates the secretion of thyrotropin-releasing hormone (TSH)
c.Dopamine stimulates prolactin secretion
d. Somatostatin inhibits the secretion of growth hormone
e. Arginine-vasopressin stimulates the secretion of adrenocorticotropic hormone
(ACTH)
c.Dopamine stimulates prolactin secretion
Which statement about the pituitary gland is NOTcorrect?
a. The pituitary gland, or brain appendage, lies in the sella turcica
b. The pituitary gland weighs up to 1 gram
c. Five types of pituitary cells secrete 6 types of hormones
d.The neurohypophysis arises from Rathke’s sac
e. After disruption of the pituitary stalk, prolactin secretion increases
d.The neurohypophysis arises from Rathke’s sack
Which statement is correct?
a. After a brain injury, the functioning of the pituitary gland is very rarely affected
b.After irradiation of the pituitary gland (due to a tumor), the secretion of prolactin increases
temporarily
c. After disruption of the pituitary stalk, prolactin secretion decreases
d. Dopamine antagonists inhibit prolactin secretion
e. Macroprolactin is an extremely active form of prolactin
b.After irradiation of the pituitary gland (due to a tumor), the secretion of prolactin increases
temporarily
Local symptoms caused by pituitary tumors can include all of the following,except:
a. Temporal epilepsy
b. Liquor
c. Hydrocephalus
d.Affection of the 5th and 9th cranial nerves
e. Drops in the field of view
d.Affection of the 5th and 9th cranial nerves
Which of the following syndromes doesn’t belong to the hypothalamus?
a. Kallman syndrome
b.Marfan syndrome
c. Laurence-Moon syndrome
d. Prader-Willi syndrome
e. Bardet-Biedl syndrome
b.Marfan syndrome
Which pituitary adenomas are the most common?
a.Prolactinomas (lactotropic adenomas)
b. Somatotropic adenomas
c. TSH adenomas
d. Corticotropic (ACTH) adenoma
e. Gonadotropic adenomas
a.Prolactinomas (lactotropic adenomas)
Which of the following statements are consistent with the diagnosis of a pituitary tumor (or do not
exclude it)?
a.diplopia due to damage to the oculomotor nerve
b.loss of vision in one eye
c.discharge of cerebrospinal fluid from the nose
d. normal pituitary test results
e.normal size of the sella turcica on a normal radiograph
d. normal pituitary test results
The morphological cause of hypopituitarism is best determined by:
a. X-ray imaging of the Turkish saddle in two projections
b. CT scan of the hypothalamic-pituitary region
c.MRI of the hypothalamic-pituitary region
d. Scintigraphy with isotopically labeled octreotide
e. Scintigraphy with MIBG
c.MRI of the hypothalamic-pituitary region
What are the most common tumors in the region of the sella turcica?
a. Craniopharyngiomas
b. meningiomas
c. germinomas
d.adenomas
e. breast and lung carcinoma cells
d.adenomas
Pituitary tumors can cause symptoms and signs in a variety of ways. Excluding extremely
rare cases, it is all of the listed conditions except for:
a. increased production of prolactin
b. impaired production of TSH
c. pressure on the optic chiasm
d.liver metastases
e. increased production of growth hormone
d.liver metastases