brs endocrine

Question 0

A woman has hypocalcemia, hyperphosphatemia, and decreased urinary phosphate excretion. Injection of parathyroid hormone (PTH) causes an increase in urinary cyclic adenosine monophosphate (cAMP). The most likely diagnosis?

Answer 0

hypoparathyroidism after thyroid surgery

Question 1

What hormone acts on its target tissues by a steroid hormone mechanism of action?

Answer 1

Thyroid hormone

Question 2

A man who has galactorrhea is found to have a prolactinoma. His physician treats him with bromocriptine, which eliminates the galactorrhea. The basis for the therapeutic action of bromocriptine is that it

Answer 2

inhibits prolactin release from the anterior pituitary

Question 3

What function of the Sertoli cells mediates negative feedback control of FSH secretion?

Answer 3

synthesis of inhibin

Question 4

What hormone is derived from proopiomelanocortin (POMC)?

Answer 4

Adrenocorticotropic hormone (ACTH)

Question 5

What inhibits the secretion of growth hormone by the anterior pituitary?

Answer 5

somatomedins

Question 6

Selective destruction of the zona glomerulosa of the adrenal cortex would produce a deficiency in which hormone ?

Answer 6

Aldosterone

Question 7

What explains the suppression of lactation during pregnancy?

Answer 7

blood levels of estrogen and progesterone are high

Question 8

What results from the action of parathyroid hormone (PTH) on the renal tubule?

Answer 8

stimulation of Ca++ reabsorption in the distal tubule

Question 9

A woman has hirsutism, hyperglycemia, obesity, muscle wasting, and increased circulating levels of ACTH. The most likely cause of her symptoms is

Answer 9

primary overproduction of ACTH (Cushing’s disease)

Question 10

This disease decreases the conversion of 25-hydroxycholecalciderol to 1,25-dihydroxycholecalciferol?

Answer 10

Chronic renal failure

Question 11

Increased ACTH secretion would be expected in patients with

Answer 11

chronic adrenocortical insufficiency (Addison’s disease)

Question 12

What would expected to be increased in a patient with Grave’s disease

Answer 12

triiodothyronine (T3) levels

Question 13

secretion of oxytocin is increased by

Answer 13

dilation of the cervix

Question 14

what hormone acts by an inositol 1,4,5-triphosphate (IP3)-Ca++ mechanism of action?

Answer 14

GnRH

Question 15

A patient with untreated diabetes type I is brought to the ER. An injection of insulin would be expected to cause an increase in her

Answer 15

blood pH

Question 16

The source of estrogen during the second and third trimesters of pregnancy is the

Answer 16

fetal adrenal gland, fetal liver, and placenta

Question 17

What causes increased aldosterone secretion

Answer 17

decreased blood volume