Pregnancy and birth Knowledge-Based Download PDF

Questions

1. 1.

   During human pregnancy, which extraembryonic membrane directly encloses the fluid-filled cavity that cushions the developing fetus against mechanical trauma and allows unrestricted physical movement?

   • A) Allantois
   • B) Chorion
   • C) Yolk sac
   • D) Amnion
2. 2.

   During human labor, which distinct stage immediately follows the birth of the infant and involves the detachment and delivery of the placenta along with extraembryonic membranes?

   • A) Dilation stage
   • B) Expulsion stage
   • C) Placental stage
   • D) Effacement stage
3. 3.

   Which blood vessel is responsible for transporting oxygenated and nutrient-rich blood from the placenta directly to the developing fetus?

   • A) Umbilical vein
   • B) Umbilical artery
   • C) Uterine vein
   • D) Ductus arteriosus
4. 4.

   Following the successful implantation of a blastocyst into the uterine wall, which hormone is secreted by embryonic trophoblast cells to maintain the corpus luteum and sustain early pregnancy?

   • A) Human chorionic gonadotropin (hCG)
   • B) Luteinizing hormone (LH)
   • C) Prolactin (PRL)
   • D) Follicle-stimulating hormone (FSH)
5. 5.

   During human childbirth, which hormone is released from the posterior pituitary gland to stimulate rhythmic uterine smooth muscle contractions via a positive feedback mechanism?

   • A) Prolactin
   • B) Progesterone
   • C) Oxytocin
   • D) Human chorionic gonadotropin