Lab Test 4: Hormones bts

Question 1

Hormones are derived from

Answer 1

Amino acids, peptides and cholesterol

All of the above

Question 2

Choose the correct statement

Answer 2

Sex hormones are synthesized from cholesterol

Question 3

Amine-like hormones act

Answer 3

Via membrane receptors and protein G

Question 4

Hormones are secreted

Answer 4

into the bloodstream

Question 5

Thyroxine

Answer 5

The main binding protein is TBG

Question 6

The tropic hormone

Answer 6

Influences other gland and the production of its hormone

Question 7

A hormone with cyclic fluctuation of its concentration

Answer 7

Cortisol and LH

Both B and C are correct

OR

Cortisol

_{not TSH}

Question 8

Insulin-induced hypoglycemia

Answer 8

Stimulates secretion of GH

Question 9

Hormone metabolites should be measured

Answer 9

In a 24 h urine collection

Question 10

Hormone binding to proteins

Answer 10

Influences its bioavailability

Extends the biological half life

Both A and B are correct

Question 11

Assign tropic hormones to proper hormones

Answer 11

FSH and testosterone

Question 12

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

Answer 12

Thyroxine

Question 13

Choose the correct statement

Answer 13

Androstenedione is a precursor for testosterone

Question 14

Which hormones are derivatives of cholesterol?

Answer 14

estradiol, cortisol, testosterone

and also aldosterone which is not part of the options

Question 15

Mineralocorticoids include

Answer 15

Aldosterone

Question 16

Which hormones are derived from amino acids?

Answer 16

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)}

Question 17

To measure hormone levels in serum we can use the method

Answer 17

ELISA

Question 18

Which hormone act via tyrosine kinase receptors?

or

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

Answer 18

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

Question 19

We use provocative endocrine tests to measure the level of

Answer 19

GH, ACTH, TSH

all of the answers are correct

Question 20

FSH(Follicle - stimulating hormone) acts on

Answer 20

Ovary, Testes

Both A and C are correct

Question 21

Aldosterone

Answer 21

is a cholesterol derivative

Question 22

Choose the correct statement about hormones

Answer 22

Steroid hormones enter cells before binding to their receptors

Question 23

The rate of clearance of insulin is within

Answer 23

minutes

Question 24

Which of the following hormone is produced by the hypothalamus

Answer 24

Thyrotropin-releasing hormone(TRH)

Question 25

Measurement of urinary concentration of hormones or their metabolites can be used…

Answer 25

pregnancy, secretory adrenal tumors

both a and b are correct

Question 26

The biologically active form of hormone is

Answer 26

unbound (free) cortisol

Question 27

Which of the followuing hormones are produced by hypothalamus and released by posterior pituitary?

Answer 27

oxytocin, antidiuretic hormone

Question 28

Thyrotropin-releasing hormone(TRH)

Answer 28

stimulates secretion of TSH and PRL

Question 29

Albumin is responsible for binding approximately

Answer 29

10-15% of thyroxine

Question 30

Cortisol is being inactivated by

Answer 30

11ß-hydroxsteroid dehydrogenase II

Question 31

Choose the correct statement

or

Which of the following sentences about proteins transporting hormones in plasma is correct?

Answer 31

unbound hormone is generally the biologically active form

or

the free(unbound) form of a hormone is biologically active

Question 32

Choose the correct pair-hypothalmic hormone and its influence on pituitary hormones

OR

Choose the correct statement concerning Growth hormone(GH)

Answer 32

GHRH- stimulates secretion of GH

or

its secretion is inhibited by GHIH

(gonadotropin inhibiting hormone or somatostatin)

Question 33

Chosse the correct pair-hormone and site of its production

Answer 33

antidiuretic hormone-hypothalamus

Question 34

Which of the following is concerning hormones is correct?

Answer 34

Thyroid-stimulating hormone is a glycoprotein

Question 35

Which method cannot be used to measure hormone concentration in the serum

Answer 35

RT-PCR

Question 36

The release of which of the following is inhibited by glucocorticoids?

Answer 36

ACTH

Question 37

In patients suspected of having an excess or defieciency of thyroid hormones TSH concentration can be measured using which of the following methods

Answer 37

ELISA

Question 38

Choose the false statement

Answer 38

Aldosterone may be converted to testosterone

Question 39

Which hormones are not derived from amino acids

Answer 39

aldosterone, cortisol, estradiol

Question 40

Choose the correct sentence concerning radioimmunoassay:

Answer 40

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