Free Printable Ch 27 BIO

1.

Which 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

2.

What term describes the ectoderm, mesoderm, and endoderm?

a)

Inner cell mass

b)

Extraembryonic membranes

c)

Primary germ layers

d)

Blastomeres

3.

What is the outer extraembryonic membrane that forms finger-like projections called villi and helps form the placenta?

a)

Amnion

b)

Chorion

c)

Umbilicus

d)

Trophoblast

4.

Which of the following is a disclike structure 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

5.

Which of the following develops first?

a. Morula

b. Trophoblast

c. Blastomere

d. Zygote

a)

a

b)

B

c)

C

d)

D

6.

Which cream cheese-like substance is secreted by baby’s sebaceous glands and protects the skin from the amniotic fluid?

a. Lanugo

b. Colostrum

c. Vernix caseosa

d. Meconium

a)

a

b)

b

c)

c

d)

d

7.

Which word refers to milk production by the mammary glands?

a. Implantation

b. Parturition

c. Lactation

d. Quickening

a)

a

b)

b

c)

c

d)

d

8.

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

a. Vernix caseosa

b. Lanugo

c. Colostrum

d. Meconium

a)

a

b)

b

c)

c

d)

d

9.

Which of the following describes the consequence of this event: two ova are fertilized by two different sperm?

a. Monozygotic twins

b. Identical twins

c. Dizygotic twins

d. More than one of the above are true

a)

a

b)

b

c)

c

d)

d

10.

Which hormone is secreted by the trophoblastic cells during implantation and helps preserve the corpus luteum?

a. Estrogen

b. Progesterone

c. hCG

d. FSH

a)

a

b)

b

c)

c

d)

d

11.

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

a)

a

b)

b

c)

c

d)

d

12.

Which of the following is divided into trimesters?

a. Conception

b. Fertilization

c. Pregnancy

d. Ovulation

a)

a

b)

b

c)

c

d)

d

13.

Which of the following is most related to fertilization?

a. Broad ligament

b. Implantation

c. Menses

d. 23 chromosomes plus 23 chromosomes

a)

a

b)

b

c)

c

d)

d

14.

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

a)

a

b)

b

c)

c

d)

d

15.

Which of the following is most descriptive of a zygote?

a. Fertilized ovum

b. Mature sperm

c. Graafian follicle

d. Fetus

a)

a

b)

b

c)

c

d)

d

16.

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

a. An embryo

b. A fetus

c. A blastocyst

d. A zygote

a)

a

b)

b

c)

c

d)

d

17.

The conversion of the corpus luteum to the corpus albicans

a. is characteristic of the nonpregnant state

b. is due to the secretion of hCG

c. prevents ovulation in the next menstrual cycle

d. occurs only in twinning

a)

a

b)

b

c)

c

d)

d

18.

The conversion of the corpus luteum to the corpus albicans

a. is characteristic of the nonpregnant state

b. is due to the secretion of hCG

c. prevents ovulation in the next menstrual cycle

d. occurs only in twinning

a)

a

b)

b

c)

c

d)

d

19.

Afterbirth refers primarily to which structure?

a. Morula

b. Zygote

c. Fetus

d. Placenta

a)

a

b)

b

c)

c

d)

d

20.

Which hormone literally means “swift birth” and assists in labor?

a. Prostaglandin

b. Progesterone

c. Oxytocin

d. Prolactin

a)

a

b)

b

c)

c

d)

d

21.

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

a. Milk production

b. Breasts

c. Corpus luteum

d. Anterior pituitary gland

a)

a

b)

b

c)

c

d)

d

22.

What is the hormonal basis of the pregnancy test?

a. Estrogen

b. Prostaglandin

c. Oxytocin

d. Human chorionic gonadotropin (hCG)

a)

a

b)

b

c)

c

d)

d

23.

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

a. Prolactin

b. Progesterone

c. Oxytocin

d. Human chorionic gonadotropin

a)

a

b)

b

c)

c

d)

d

24.

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

a)

a

b)

b

c)

c

d)

d

25.

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

a. zygote

b. morula

c. fetus

d. embryo

a)

a

b)

b

c)

c

d)

d

26.

What is the baby-to-be called after 9 weeks of development?

a. Zygote

b. Fetus

c. Embryo

d. Neonate

a)

a

b)

b

c)

c

d)

d

27.

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

a)

a

b)

b

c)

c

d)

d

28.

Which of the following give(s) rise to the endoderm, mesoderm, and ectoderm?

a. The zygote

b. The extraembryonic membranes

c. Primary germ layers

d. The placenta

a)

a

b)

b

c)

c

d)

d

29.

The fimbriae sweep the ovum into which structure immediately following ovulation?

a. Uterus

b. Fallopian tube

c. Vagina

d. Ovary

a)

a

b)

b

c)

c

d)

d

30.

Which of the following literally means “monster-producing”?

a. Abortion

b. Involution

c. Teratogenic

d. Embryonic

a)

a

b)

b

c)

c

d)

d

31.

Which of the following is the first event?

a. Parturition

b. Implantation

c. Placental development

d. Secretion of vernix caseosa

a)

a

b)

b

c)

c

d)

d

32.

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 in the mother’s DNA

c. Congenital

d. Contagious

a)

a

b)

b

c)

c

d)

d

33.

Which of the following is most associated with organogenesis?

a. Embryonic period

b. Implantation

c. Third trimester

d. Neonatal period

a)

a

b)

b

c)

c

d)

d

34.

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

a. Having Down syndrome

b. Hemophiliac

c. Immature

d. Male

a)

a

b)

b

c)

c

d)

d

35.

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

a)

a

b)

b

c)

c

d)

d

36.

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

a. XX

b. XY

c. Autosomes

d. X-linked

a)

a

b)

b

c)

c

d)

d

37.

Who or what determines the gender of the baby?

a. Placenta

b. Zygote

c. Father

d. Mother

a)

a

b)

b

c)

c

d)

d

38.

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

a)

a

b)

b

c)

c

d)

d

39.

The milk let-down reflex is most associated with

a. estrogen.

b. oxytocin.

c. prolactin.

d. hCG.

a)

a

b)

b

c)

c

d)

d

40.

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

a)

a

b)

b

c)

c

d)

d

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

a)

a

b)

b

c)

c

d)

d

42.

Which group is incorrect?

a. Primary germ layers: ectoderm, mesoderm, chromosomes

b. Embryonic structures: zygote, blastomere, morula, blastocyst

c. Genes: dominant, recessive, codominant

d. Genetic disorders: Down, Edward, and Patau syndromes

a)

a

b)

b

c)

c

d)

d

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

a)

a

b)

b

c)

c

d)

d

44.

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

a)

a

b)

b

c)

c

d)

d

45.

Fertilization is most apt to occur when sexual intercourse takes place close to

a. ovulation

b. early adenohypophyseal secretion of gonadotropins

c. the last day of a 28-day cycle

d. the first day of a 28-day cycle

a)

a

b)

b

c)

c

d)

d

46.

Which of the following is characterized by quickening, lanugo, and vernix caseosa?

a. Zygote

b. Trophoblast

c. Embryo

d. Fetus

a)

a

b)

b

c)

c

d)

d

47.

With which word is fetal alcohol most associated?

a. Colostrum

b. Teratogen

c. Thalidomide

d. Eclampsia

a)

a

b)

b

c)

c

d)

d

48.

Which of the following is formed when the chorionic villi burrow into the endometrial lining?

a. Yolk sac

b. Placenta

c. Umbilical cord

d. Ductus venosus

a)

a

b)

b

c)

c

d)

d

49.

Which of the following is most apt to develop in response to compression of the umbilical cord?

a. Hemolytic jaundice of the newborn (hyperbilirubinemia)

b. Endometriosis (maternal)

c. Fetal hypoxemia

d. Premature separation of the placenta

a)

a

b)

b

c)

c

d)

d

50.

Which of the following is accomplished during the eighth month of fetal development?

a. Baby fattens up

b. Baby’s bone marrow begins to function

c. Amniotic fluid begins to accumulate in the amniotic sac

d. Mom starts to lactate

a)

a

b)

b

c)

c

d)

d

51.

Which of the following is true of parturition?

a. The fetus becomes a neonate

b. Refers to the birth process

c. Can only occur after 36 weeks of pregnancy

d. Both A and B are true

a)

a

b)

b

c)

c

d)

d

52.

The chorionic villi sit in blood-filled endometrial spaces called

a. the umbilical cord

b. the lacunae

c. the yolk sac

d. allantois

a)

a

b)

b

c)

c

d)

d

53.

This structure carries oxygenated blood from the placenta to the fetus.

a. Umbilical artery

b. Ductus arteriosus

c. Embryonic disc

d. Umbilical vein

a)

a

b)

b

c)

c

d)

d

54.

Which of the following is the latest stage of development?

a. Morula

b. Blastomeres

c. Blastocyst

d. Zygote

a)

a

b)

b

c)

c

d)

d

55.

Which of the following is least characteristic of hCG?

a. Secreted by trophoblasts

b. Maintains the corpus luteum

c. Maintains maternal levels of estrogen and progesterone

d. Exerts an oxytoxic effect

a)

a

b)

b

c)

c

d)

d

56.

Which of the following is an ovarian event?

a. Fertilization

b. Implantation

c. Maturation of the graafian follicle

d. Cleavage and blastomere formation

a)

a

b)

b

c)

c

d)

d

57.

Which of the following is true regarding lactation?

a. Suckling causes the alveolar glands to secrete oxytocin

b. Suckling stimulates the sensory nerves of the milk let-down reflex

c. Flow of milk through the lactiferous ducts is the sensory response to suckling

d. Prolactin is secreted in response to suckling

a)

a

b)

b

c)

c

d)

d

58.

Which of these hormones is released in response to suckling and activation of the hypothalamus and neurohypophysis?

a. Progesterone

b. Estrogen

c. Oxytocin

d. Prolactin

a)

a

b)

b

c)

c

d)

d

59.

Which of the following is (are) most associated with the following: areola, suspensory ligaments, lactiferous ducts, and alveolar glands?

a. Uterus

b. Breasts

c. Posterior pituitary gland

d. Ovulation

a)

a

b)

b

c)

c

d)

d

Ch 27 BIO

Total questions: 59

Worksheet time: 30mins

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