Lab Test 4: Hormones bts Flashcards

1
Q

Hormones are derived from

A

Amino acids, peptides and cholesterol

All of the above

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2
Q

Choose the correct statement

A

Sex hormones are synthesized from cholesterol

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3
Q

Amine-like hormones act

A

Via membrane receptors and protein G

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4
Q

Hormones are secreted

A

into the bloodstream

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5
Q

Thyroxine

A

The main binding protein is TBG

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6
Q

The tropic hormone

A

Influences other gland and the production of its hormone

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7
Q

A hormone with cyclic fluctuation of its concentration

A

Cortisol and LH

Both B and C are correct

OR

Cortisol

not TSH

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8
Q

Insulin-induced hypoglycemia

A

Stimulates secretion of GH

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9
Q

Hormone metabolites should be measured

A

In a 24 h urine collection

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10
Q

Hormone binding to proteins

A

Influences its bioavailability

Extends the biological half life

Both A and B are correct

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11
Q

Assign tropic hormones to proper hormones

A

FSH and testosterone

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12
Q

Which hormone has the longest half-life in the human body?

A

Thyroxine

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13
Q

Choose the correct statement

A

Androstenedione is a precursor for testosterone

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14
Q

Which hormones are derivatives of cholesterol?

A

estradiol, cortisol, testosterone

and also aldosterone which is not part of the options

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15
Q

Mineralocorticoids include

A

Aldosterone

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16
Q

Which hormones are derived from amino acids?

A

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)

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17
Q

To measure hormone levels in serum we can use the method

18
Q

Which hormone act via tyrosine kinase receptors?

or

Insulin and Insulin-like growth factor 1(IGF-1) act via

A

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

19
Q

We use provocative endocrine tests to measure the level of

A

GH, ACTH, TSH

all of the answers are correct

20
Q

FSH(Follicle - stimulating hormone) acts on

A

Ovary, Testes

Both A and C are correct

21
Q

Aldosterone

A

is a cholesterol derivative

22
Q

Choose the correct statement about hormones

A

Steroid hormones enter cells before binding to their receptors

23
Q

The rate of clearance of insulin is within

24
Q

Which of the following hormone is produced by the hypothalamus

A

Thyrotropin-releasing hormone(TRH)

25
Measurement of urinary concentration of hormones or their metabolites can be used...
pregnancy, secretory adrenal tumors both a and b are correct
26
The biologically active form of hormone is
unbound (free) cortisol
27
Which of the followuing hormones are produced by hypothalamus and released by posterior pituitary?
oxytocin, antidiuretic hormone
28
Thyrotropin-releasing hormone(TRH)
stimulates secretion of TSH and PRL
29
Albumin is responsible for binding approximately
10-15% of thyroxine
30
Cortisol is being inactivated by
11ß-hydroxsteroid dehydrogenase II
31
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
32
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)
33
Chosse the correct pair-hormone and site of its production
antidiuretic hormone-hypothalamus
34
Which of the following is concerning hormones is correct?
Thyroid-stimulating hormone is a glycoprotein
35
Which method cannot be used to measure hormone concentration in the serum
RT-PCR
36
The release of which of the following is inhibited by glucocorticoids?
ACTH
37
In patients suspected of having an excess or defieciency of thyroid hormones TSH concentration can be measured using which of the following methods
ELISA
38
Choose the false statement
Aldosterone may be converted to testosterone
39
Which hormones are not derived from amino acids
aldosterone, cortisol, estradiol
40
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