Which of the following is the latest stage of development?
Blastocyst
Which group is incorrect?
Extraembryonic membranes: graafian follicle, chorion, yolk sac
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Which of the following is the latest stage of development?
Blastocyst
Which group is incorrect?
Extraembryonic membranes: graafian follicle, chorion, yolk sac
Fertilization is most apt to occur when sexual intercourse takes place close to:
ovulation.
Which of the following is most related to fertilization?
23 chromosomes plus 23 chromosomes
Which of the following is true of parturition?
Both The fetus becomes a neonate and Refers to the birth process.
Which of the following is most related to human chorionic gonadotropin (hCG)?
Corpus luteum
Which of the following is an ovarian event?
Maturation of the graafian follicle
Which of the following prevents the deterioration of the corpus luteum during early pregnancy?
Human chorionic gonadotropin
Afterbirth refers primarily to which structure?
Placenta
From week 3 to week 8, the baby-to-be is called a(n):
embryo.
The blastocyst:
lives in the uterus.
In addition to acting as an exchange site between the mother and fetus, the placenta also secretes:
estrogen and progesterone.
Which of the following is most apt to develop in response to compression of the umbilical cord?
Fetal hypoxemia
Which of the following is accomplished during the eighth month of fetal development?
Baby fattens up.
Who or what determines the gender of the baby?
Father
Which of the following is a disclike structure where the fetal and maternal circulations meet (baby eats, excretes, and breathes at this site)?
Placenta
What is the name of the fine downy hair that covers the fetus?
Lanugo
Which of the following is divided into trimesters?
Pregnancy
With which word is fetal alcohol most associated?
Teratogen
What is the hormonal basis of the pregnancy test?
Human chorionic gonadotropin (hCG)
Which of the following is least characteristic of hCG?
Exerts an oxytoxic effect
Which of the following best describes the amnion, chorion, yolk sac, and allantois?
: Extraembryonic membranes
A mother-to-be infected with the rubella virus gives birth to a child with multiple birth defects. Which of the following is descriptive of the defects?
Congenital
Which of the following is the first event?
Implantation
What is the baby-to-be called after 9 weeks of development?
Fetus
The fimbriae sweep the ovum into which structure immediately following ovulation?
Fallopian tube
Which of the following literally means “monster-producing”?
Teratogenic
What term describes the ectoderm, mesoderm, and endoderm?
Primary germ layers
How is a child with X and Y chromosomes best described?
Male
In the later stages of pregnancy, most of the mother’s estrogen and progesterone comes from the:
placenta.
Which of the following is least related to the sex chromosomes?
Autosomes
Which group is incorrect?
Embryonic structures: zygote, blastomere, morula, blastocyst
What “lives” in the fallopian tube for a brief period of time?
A zygote
Which of the following is most associated with organogenesis?
Embryonic period
Which of the following describes the consequence of this event: two ova are fertilized by two different sperm?
Dizygotic twins
Which of these hormones is released in response to suckling and activation of the hypothalamus and neurohypophysis?
Oxytocin
Which of the following is most descriptive of a zygote?
Fertilized ovum
Which of the following is characterized by quickening, lanugo, and vernix caseosa?
Fetus
Which of the following is formed when the chorionic villi burrow into the endometrial lining?
Placenta
Which of the following is true regarding lactation?
Suckling stimulates the sensory nerves of the milk let-down reflex.
Which of the following is (are) most associated with the following: areola, suspensory ligaments, lactiferous ducts, and alveolar glands?
Breasts
Which group is incorrect?
Stages of labor: dilation, expulsion, lactation
The conversion of the corpus luteum to the corpus albicans
is characteristic of the nonpregnant state.
This structure carries oxygenated blood from the placenta to the fetus.
Umbilical vein
Which cream cheeselike substance is secreted by baby’s sebaceous glands and protects the skin from the amniotic fluid?
Vernix caseosa
Which group is incorrect?
Stages of labor: dilation, expulsion, placental, embryonic
What is the name of the developmental process that refers to the shaping of the cell cluster?
Morphogenesis
Which of the following is an example of nondisjunction?
Down syndrome
Which word refers to milk production by the mammary glands?
Lactation
Which hormone is secreted by the trophoblastic cells during implantation and helps preserve the corpus luteum?
hCG
What is the outer extraembryonic membrane that forms fingerlike projections called villi and helps form the placenta?
Chorion
The milk let-down reflex is most associated with:
oxytocin.
Which of the following develops first?
Zygote
Which structure is commonly called the bag of water (it breaks prior to delivery and often signals the onset of labor)?
Amniotic sac
Which of the following is least true of prolactin?
Plays the primary role in the milk let-down reflex.
Which of the following is true of implantation?
It occurs within the uterus.
Which of the following give(s) rise to the endoderm, mesoderm, and ectoderm?
Primary germ layers
The chorionic villi sit in blood-filled endometrial spaces called:
the lacunae.
Which hormone literally means “swift birth” and assists in labor?
Oxytocin