Block 1 Mini 1 Pt 2 Placenta Dr Kalli
Settings
-
+
.
- 1.The absence of a ventral double-fold of coelomic membrane connecting the heart to the ventral body wall (a ventral mesocardium) is a result of
- A.
Degeneration of this mesentery
- B.
Formation of the pericardiopleural canals
- C.
Formation of the pleuroperitoneal canals
- D.
Absence of a ventral mesentery on the ventral body wall below the ligamentum teres
- E.
A bilateral connection of the early intraembryonic coelom rostral to the developing heart
- 2.After the twentieth week of gestation, a thinned vasculosyncytial placental membrane is formed consisting of the following three layers:
- A.
Syncytiotrophoblast – cytotrophoblast – fetal capillary endothelium
- B.
Maternal capillary endothelium - syncytiotrophoblast – fetal capillary epithelium
- C.
Syncytiotrophoblast – connective tissue of the villus – fetal capillary endothelium
- D.
Connective tissue of the villus – syncytiotrophoblast - maternal capillary endothelium
- E.
Maternal capillary endothelium – syncytiotrophoblast – cytotrophoblas
- 3.
- A.
She postpone the surgery until after the birth of her child
- B.
She postpone the surgery until the third trimester of her pregnancy
- C.
She immediately have the surgery with post-operative progesterone supplements
- D.
She immediately have the surgery with estrogen supplements
- E.
She immediately have the surgery with no hormonal steroid supplements
- 4.Ectopia cordis or Pentalogy of Cantrell is a congenital malformation of the anterior body wall that includes a defect of the lower sternum, a deficient anterior diaphragm, and a heart that lies outside the chest. This condition is primarily a defect in what embryological process?
- A.
Formation of the intraembryonic coelom
- B.
Lateral folding
- C.
Formation of the intermediate mesoderm
- D.
Longitudinal folding
- E.
Formation of the head fold
- 5.Through which blood vessel does the most oxygenated blood flow to supply the fetus?
- A.
Umbilical artery
- B.
Pulmonary artery
- C.
Aorta
- D.
Femoral artery
- E.
Internal carotid artery
- 6.During Stage 3 of labor, the placenta separates at which layer from the uterus?
- A.
Spongy layer of the decidua basalis
- B.
At the chorionic plate
- C.
Between the chorion and the amnion
- D.
Between the smooth chorion (chorion leave) and the decidua parietalis
- E.
At the umbilical cord
- 7.Which hormone is first produced by the syncytiotrophoblast cells of the early placenta to maintain the viability of the corpus luteum?
- A.
Progesterone
- B.
Relaxin
- C.
Human chorionic gonadotropin
- D.
Ectoderm
- E.
Adrenocorticotropin hormone
- 8.During the final stages of fetal development (5 months to term) the placental barrier is composed of
- A.
Syncytiotrophoblast and endothelial of fetal capillaries
- B.
Cytotrophoblast and endothelial of fetal capillaries
- C.
Syncytiotrbphoblast, cytotrophoblast, mesenchyme and endothelial of fetal capillaries
- D.
Decidua basalis, syncytiotrophchlast and cytotrophoblast
- E.
Decidua parietalis and chorionic frondosum
- 9.Which one of the following substances crosses the placental barrier?
- A.
IgA
- B.
Hormones from the pituitary gland
- C.
Maternal cholesterol
- D.
IgG
- E.
Maternal phospholipids
- 10.Which of the following structures gives rise to the umbilical arteries and vein?
- A.
The allantois
- B.
The yolk sac
- C.
Chorion
- D.
The chorion frondosum
- E.
Amnion
- 11.Most drugs taken during early pregnancy are transported across the placental barrier primarily by:
- A.
Phagocytosis
- B.
Simple diffusion
- C.
Facilitated diffusion
- D.
Active transport
- E.
Pinocytosis
- 12.Which of the following substances DOES NOT cross the placental barrier?
- A.
Cortisol – a steroidal hormone
- B.
Triglycerides
- C.
Amino acids
- D.
Glucose
- E.
IgG
- 13.Which of the following cell types is involved in the production of placental estrogen?
- A.
Decidua basalis
- B.
Cytotrophoblast cells
- C.
Yolk sac cells
- D.
Extraembryonic somatic mesoderm
- E.
Syncytiotrophoblast
Back to top