A) The distal parts of the umbilical arteries form the superior vesical arteries.
B) The fossa ovalis becomes the foramen ovale.
C) The umbilical vein becomes the ligamentum teres.
D) The hepatic portal vein forms from the umbilical artery.
Answer: C) The umbilical vein becomes the ligamentum teres.
A) destined to remain in the uterus after the birth of the infant
B) located between the developing embryo and the myometrium
C) not a maternal contribution to the placenta
D) the tissue that surrounds the uterine cavity face of the implanted embryo
Answer: B) located between the developing embryo and the myometrium
A) aspirin
B) wine
C) thalidomide
D) German measles
Answer: A) aspirin
A) all nervous tissue
B) endothelium of blood and lymph vessels
C) glandular derivatives of the digestive tract
D) epithelium of the digestive tract
Answer: B) endothelium of blood and lymph vessels
A) epithelium of the respiratory tract
B) synovial membranes of the joints
C) blood, bone marrow, and lymphoid tissue
D) organs of the urogenital system
Answer: A) epithelium of the respiratory tract
A) The corpus luteum is maintained until the placenta takes over its hormone-producing functions.
B) The corpus luteum degenerates and becomes the corpus albicans.
C) The ovarian cycle begins.
D) Increased levels of FSH will be produced.
Answer: A) The corpus luteum is maintained until the placenta takes over its hormone-producing functions.
A) phagocytosis by the trophoblast cells
B) proteolytic enzymes produced by the trophoblast cells
C) settling of the blastocyst onto the prepared uterine lining
D) adherence of the trophoblast cells to the endometrium
Answer: A) phagocytosis by the trophoblast cells
A) cell division by mitosis with little or no growth between successive divisions
B) forming the primary germ layer
C) splitting the cell into two separate cells
D) meiotic cell divisions
Answer: A) cell division by mitosis with little or no growth between successive divisions
A) nutrients and respiratory gases only
B) hormones, blood cells, and nutrients
C) nutrients, respiratory gases, wastes, and alcohol
D) respiratory gases, hormones, nutrients, and blood cells
Answer: C) nutrients, respiratory gases, wastes, and alcohol
A) hormonal attraction to the ova
B) reverse peristalsis of the uterus and uterine tubes
C) the cilia on the apex of the cells lining the endometrium
D) the increased temperature in the vagina, which stimulates sperm motility
Answer: B) reverse peristalsis of the uterus and uterine tubes
A) dystocia
B) expulsion
C) placental
D) full dilation
Answer: C) placental
A) human placental lactogen
B) human chorionic thyrotropin
C) relaxin
D) inhibin
Answer: D) inhibin
A) dilation stage
B) expulsion stage
C) placental stage
D) gastrula stage
Answer: B) expulsion stage
A) mesoderm
B) ectoderm
C) endoderm
D) epiderm
Answer: A) mesoderm
A) epiderm
B) endoderm
C) mesoderm
D) ectoderm
Answer: D) ectoderm
A) allantois
B) archenteron
C) placental tissue
D) lining of the endometrium
Answer: C) placental tissue
A) The foramen ovale between the atria of the fetal heart closes at the moment of birth.
B) The ductus venosus is disconnected at the severing of the umbilical cord and all visceral blood goes into the vena cava.
C) The urinary system is activated at birth.
D) The ductus arteriosus constricts and is converted to the ligamentum arteriosum.
Answer: D) The ductus arteriosus constricts and is converted to the ligamentum arteriosum.
A) 12-24 hours
B) 24-36 hours
C) 36-72 hours
D) a full week
Answer: A) 12-24 hours
A) Both spermatozoa and the ovulated secondary oocyte remain viable for about 72 hours in the female reproductive tract.
B) Millions of sperm cells are destroyed by the vagina's acidic environment.
C) If estrogen is present, the pathway through the cervical opening is blocked from sperm entry.
D) Once inside the uterus, most sperm cells are protected and remain viable.
Answer: B) Millions of sperm cells are destroyed by the vagina's acidic environment.
A) maternal blood sinuses bathe the inner cell mass
B) myometrical cells cover and seal off the blastocyst
C) the trophoblast forms two distinct layers
D) the embryo gastrulates (within 3 days)
Answer: C) the trophoblast forms two distinct layers
