Lab Test 4: Hormones bts Flashcards
Hormones are derived from
Amino acids, peptides and cholesterol
All of the above
Choose the correct statement
Sex hormones are synthesized from cholesterol
Amine-like hormones act
Via membrane receptors and protein G
Hormones are secreted
into the bloodstream
Thyroxine
The main binding protein is TBG
The tropic hormone
Influences other gland and the production of its hormone
A hormone with cyclic fluctuation of its concentration
Cortisol and LH
Both B and C are correct
OR
Cortisol
not TSH
Insulin-induced hypoglycemia
Stimulates secretion of GH
Hormone metabolites should be measured
In a 24 h urine collection
Hormone binding to proteins
Influences its bioavailability
Extends the biological half life
Both A and B are correct
Assign tropic hormones to proper hormones
FSH and testosterone
Which hormone has the longest half-life in the human body?
Thyroxine
Choose the correct statement
Androstenedione is a precursor for testosterone
Which hormones are derivatives of cholesterol?
estradiol, cortisol, testosterone
and also aldosterone which is not part of the options
Mineralocorticoids include
Aldosterone
Which hormones are derived from amino acids?
serotonin, insulin, thyroxine(T4)
others include: tripeptides: Thyrotropin releasing hormone (TRH)
small peptides: vasopressin or antidiuretic hormone(AVP, ADH), somatostatin
intermediate-size peptides: insulin, parathyroid hormone
Glycoproteins: gonadotropins, thyroid stimulating hormone(TSH), Luteinizing hormone(LH)
To measure hormone levels in serum we can use the method
ELISA
Which hormone act via tyrosine kinase receptors?
or
Insulin and Insulin-like growth factor 1(IGF-1) act via
Insulin and insulin-like growth factor(IGF1)
Both A and B are correct
or
tyrosine kinase receptors located in the plasma membrane of target cells
We use provocative endocrine tests to measure the level of
GH, ACTH, TSH
all of the answers are correct
FSH(Follicle - stimulating hormone) acts on
Ovary, Testes
Both A and C are correct
Aldosterone
is a cholesterol derivative
Choose the correct statement about hormones
Steroid hormones enter cells before binding to their receptors
The rate of clearance of insulin is within
minutes
Which of the following hormone is produced by the hypothalamus
Thyrotropin-releasing hormone(TRH)
Measurement of urinary concentration of hormones or their metabolites can be used…
pregnancy, secretory adrenal tumors
both a and b are correct
The biologically active form of hormone is
unbound (free) cortisol
Which of the followuing hormones are produced by hypothalamus and released by posterior pituitary?
oxytocin, antidiuretic hormone
Thyrotropin-releasing hormone(TRH)
stimulates secretion of TSH and PRL
Albumin is responsible for binding approximately
10-15% of thyroxine
Cortisol is being inactivated by
11ß-hydroxsteroid dehydrogenase II
Choose the correct statement
or
Which of the following sentences about proteins transporting hormones in plasma is correct?
unbound hormone is generally the biologically active form
or
the free(unbound) form of a hormone is biologically active
Choose the correct pair-hypothalmic hormone and its influence on pituitary hormones
OR
Choose the correct statement concerning Growth hormone(GH)
GHRH- stimulates secretion of GH
or
its secretion is inhibited by GHIH
(gonadotropin inhibiting hormone or somatostatin)
Chosse the correct pair-hormone and site of its production
antidiuretic hormone-hypothalamus
Which of the following is concerning hormones is correct?
Thyroid-stimulating hormone is a glycoprotein
Which method cannot be used to measure hormone concentration in the serum
RT-PCR
The release of which of the following is inhibited by glucocorticoids?
ACTH
In patients suspected of having an excess or defieciency of thyroid hormones TSH concentration can be measured using which of the following methods
ELISA
Choose the false statement
Aldosterone may be converted to testosterone
Which hormones are not derived from amino acids
aldosterone, cortisol, estradiol
Choose the correct sentence concerning radioimmunoassay:
it requires a radiolabeled antibody
It requires a specific antibody to the hormone and a radiolabeled version of the hormone containing tritium, radioactive iodine, or some other suitable isotope. The higher the concentration in the patient’s serum, the more radioactive hormone is displaced from the antibody. It is used for low abundance plasma proteins like C-reactive protein and prostrate-specific antigen
