Deck 27: Human Development and Heredity

Question 1

In addition to acting as an exchange site between the mother and fetus,the placenta also secretes

A) estrogen and progesterone.
B) amniotic fluid.
C) vernix caseosa.
D) colostrum.

Answer 1

estrogen and progesterone.

Question 2

This word refers to milk production by the mammary glands.

A) implantation
B) parturition
C) lactation
D) quickening

Answer 2

lactation

Question 3

This hormone is secreted by the trophoblastic cells during implantation and helps to preserve the corpus luteum.

A) estrogen
B) progesterone
C) hCG
D) FSH

Answer 3

hCG

Question 4

Which hormone literally means "swift birth" and initiates labor?

A) prostaglandin
B) progesterone
C) oxytocin
D) prolactin

Question 5

This outer extraembryonic membrane forms finger-like projections called villi and helps form the placenta.

A) amnion
B) chorion
C) umbilicus
D) trophoblast

Question 6

What "lives" in the fallopian tube for a brief period of time?

A) an embryo
B) a fetus
C) a blastocyst
D) a zygote

Question 7

This cream cheese-like substance is secreted by baby's sebaceous glands;it protects her skin from the amniotic fluid.

A) lanugo
B) colostrum
C) vernix caseosa
D) meconium

Question 8

What term describes the ectoderm,mesoderm,and endoderm?

A) inner cell mass
B) extraembryonic membranes
C) primary germ layers
D) blastomeres

Question 9

Afterbirth refers primarily to this structure.

A) morula
B) zygote
C) fetus
D) placenta

Question 10

Which of the following is most related to the word ectopic?

A) tubal pregnancy
B) labor
C) lactation
D) endometriosis

Question 11

This disc-like structure is the site where the fetal and maternal circulations meet;baby eats,excretes,and breathes at this site.

A) umbilicus
B) placenta
C) primary germ layers
D) zygote

Question 12

This yellowish watery fluid is secreted by the mammary glands immediately after delivery;baby feeds on this until the mother's milk comes in.

A) lanugo
B) vernix caseosa
C) meconium
D) colostrum

Question 13

What is the name of the fine,downy hair that covers the fetus?

A) vernix caseosa
B) lanugo
C) colostrum
D) meconium

Question 14

What is the name of the developmental process that refers to the shaping of the cell cluster?

A) implantation
B) conception
C) morphogenesis
D) fertilization

Question 15

Which of the following is true of implantation?

A) It is called conception.
B) It is divided into trimesters.
C) It is stimulated by FSH and LH.
D) It occurs within the uterus.

Question 16

Which happens first?

A) morula
B) trophoblast
C) blastomere
D) zygote

Question 17

This structure is commonly called the bag of waters;it breaks prior to delivery and often signals the onset of labor.

A) primary germ layers
B) morula
C) amniotic sac
D) blastocyst

Question 18

Which of the following is divided into trimesters?

A) conception
B) fertilization
C) pregnancy
D) ovulation

Question 19

Which of the following is most related to fertilization?

A) broad ligament
B) implantation
C) menses
D) 23 chromosomes plus 23 chromosomes

Question 20

Which of the following is most descriptive of a zygote?

A) fertilized ovum
B) mature sperm
C) graafian follicle
D) fetus

Question 21

Which of the following best describes the amnion,chorion,yolk sac,and allantois?

A) primary germ layers
B) inner cell mass
C) dizygotic twins
D) extraembryonic membranes

Question 22

Which of the following is least related to the sex chromosomes?

A) XX
B) XY
C) autosomes
D) X-linked

Question 23

Which of the following is an example of nondisjunction?

A) fetal alcohol syndrome
B) spina bifida secondary to maternal infection with rubella
C) Down syndrome
D) twinning

Question 24

What is baby-to-be called after 6 months of development?

A) zygote
B) fetus
C) embryo
D) neonate

Question 25

Which of the following is most related to human chorionic gonadotropin (hCG)?

A) milk production
B) breasts
C) corpus luteum
D) anterior pituitary gland

Question 26

The fimbriae suck the ovum into this structure immediately following ovulation.

A) uterus
B) fallopian tube
C) vagina
D) ovary

Question 27

From week 3 to week 8,baby-to-be is called a(n)

A) zygote.
B) morula.
C) fetus.
D) embryo.

Question 28

The blastocyst

A) lives in the uterus.
B) is a fetal structure.
C) lives in the fallopian tube.
D) is an estrogen-secreting ovarian structure.

Question 29

What is the hormonal basis of the pregnancy test?

A) estrogen
B) prostaglandin
C) oxytocin
D) human chorionic gonadotropin (hCG)

Question 30

Which of the following is most associated with organogenesis?

A) embryonic period
B) implantation
C) third trimester
D) neonatal period

Question 31

Who or what determines the gender of the baby?

A) placenta
B) zygote
C) father
D) mother

Question 32

Which of the following prevents the deterioration of the corpus luteum during early pregnancy?

A) prolactin
B) progesterone
C) oxytocin
D) human chorionic gonadotropin

Question 33

How is a child with X and Y chromosomes best described?

A) as having Down syndrome
B) as hemophiliac
C) as immature
D) as male

Question 34

In the later stages of pregnancy,most of the mother's estrogen and progesterone comes from the

A) corpus luteum.
B) corpus albicans.
C) ovaries.
D) placenta.

Question 35

The milk let-down reflex is most associated with

A) estrogen.
B) oxytocin.
C) prolactin.
D) hCG.

Question 36

What is in the "pill" that makes it contraceptive?

A) estrogen and progesterone
B) prostaglandins
C) human chorionic gonadotropin
D) prolactin

Question 37

Which of the following organs involutes following delivery of baby?

A) vagina
B) fallopian tubes
C) ovaries
D) uterus

Question 38

Which of the following literally means "monster-producing"?

A) abortion
B) involution
C) teratogenic
D) embryonic

Question 39

Which of the following gives rise to the endoderm,mesoderm,and ectoderm?

A) the zygote
B) the extraembryonic membranes
C) primary germ layers
D) the placenta

Question 40

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?

A) hereditary
B) encoded within the mother's DNA
C) congenital
D) contagious

Question 41

Which group is incorrect?

A) extraembryonic membranes:amnion,chorion,yolk sac,allantois
B) stages of labor:dilation,expulsion,lactation
C) ovarian structures:corpus luteum,corpus albicans,graafian follicle
D) genes:dominant,recessive,codominant

Question 42

Which of the following is least true of prolactin?

A) secreted by the anterior pituitary gland
B) stimulates the mammary gland
C) is an adenohypophyseal hormone
D) plays the primary role in the milk let-down reflex

Question 43

Which group is incorrect?

A) primary germ layers:ectoderm,mesoderm,endoderm
B) hormones:estrogen,progesterone,hCG,prolactin,oxytocin
C) genes:dominant,recessive,codominant
D) stages of labor:dilation,expulsion,placental,embryonic

Question 44

Which group is incorrect?

A) primary germ layers:ectoderm,mesoderm,chromosomes
B) embryonic structures:zygote,blastomeres,morula,blastocysts
C) genes:dominant,recessive,codominant
D) genetic disorders:Down,Edward,Patau syndromes

Question 45

Which group is incorrect?

A) extraembryonic membranes:graafian follicle,chorion,yolk sac
B) twinning:monozygotic,dizygotic
C) primary germ layers:ectoderm,mesoderm,endoderm
D) genes:dominant,recessive,codominant