Embryo 7

Theca lutein cells:

• Are derived from the hilus cells

• Are characteristic only for corpus hemorrhagicum

• Secrete progesterone and estrogens

• Form atretic follicles

• Surround the antral follicles

Spongiocytes are located in:

• Zona glomerulosa of suprarenal cortex

• Zona fasciculate of suprarenal cortex

• Zona reticularis of suprarenal cortex

• Suprarenal medulla

• Neurohypophysis

Chromaffin cells:

• Contain catecholamines

• Release their contents after stimulation by preganglionic sympathetic splanchnic nerves

• Produce chromogranins (not in humans)

• Only answer A and B are true

• Answers A, B and C are true

Pinealocytes are:

• Interstitial cells of the pineal gland (astroglia-like)

• Astrocyte-like neuroglial cells

• Transformed in the corpora arenacea

• Reduced when the pineal gland is actively secreting

• None of the above answers are correct

Hormone which inhibits bone resorption is produced by the:

• Chief cells of the parathyroid glands

• Oxyphil cells of the parathyroid gland

• Clear cells of the thyroid gland

• Principle cells of the thyroid gland

• Cells of zona glomerulosa

Adenohypophysis:

• Develops from Rathke’s pouch

• Is composed of cords of parenchymal cells

• Possess large sinusoidal capillaries of the secondary capillary plexus

• Only answers A and B are true

• Only answers A, B and C are true

Hormone whose main target is the cells of the distal convoluted tubules of the kidneys is produced in

• Zona glomerulosa

• Zona fasciculate

• Zona reticularis

• Principle cells of the thyroid gland

• Chromaffin cells

Resumption of the second meiotic division:

• Leads to second polar body formation

• Occurs after fusion of plasma membranes of sperm and egg

• Is responsible for the cortical reaction

• Only answers A and B are correct

• Answers A, B and C are correct

By the end of the first week of development, the human embryo:

• Develops into blastocyst

• Can undergo implantation in the uterine mucosa

• Forms the exocoelomic cavity

• Only answers A and B are true

• Answers A, B and C are true

Lacunar stage of human development:

• Takes place during second week of development

• Occurs almost in the same time as formation of primitive yolk sac

• Indicates formation of chorionic cavity(11-12 days)

• Only answers A and B are correct

• Answers A, B and C are true