Unit 13 Practice Quiz

1. Fertilization of the ovum usually occurs

a. within 1 hour of ovulation
b. three to four days following ovulation
c. in the ovary
d. in the upper 1/3 of the uterine tube

2. Sperm cannot fertilize an egg until they

a. undergo capacitation
b. undergo activation
c. lose their acrosome
d. are in the vagina for 3 days

3. All of the following are true during oocyte activation except

a. the metabolic rate of the oocyte increases
b. the ovum completes meiosis II
c. other sperm are prohibited from fertilizing the egg
d. the ovum begins mitosis

4. The period of gestation that is characterized by rapid fetal growth is the ________ trimester.

a. first
b. second
c. third
d. fourth

5. The period of gestation when the rudiments of all major organ systems appear is the ______ trimester.

a. first
b. second
c. third
d. fourth

6. The period of gestation when organs and organ systems complete most of their development and the fetus looks distinctly human is the _______ trimester.

a. first
b. second
c. third
d. fourth

7. The process of cell division that occurs after fertilization is called

a. cleavage
b. implantation
c. embryogenesis
d. meiosis

8. The penetration of the endometrium by the blastocyst is referred to as

a. cleavage
b. implantation
c. embryogenesis
d. meiosis

9. The solid ball of cells that is formed after several rounds of cell division following fertilization is called a

a. chorion
b. blastula
c. morula
d. blastocyst

10. The inner cell mass of the blastocyst will

a. form the placenta
b. form the morula
c. form the embryo
d. oocyte

11. During implantation the

a. syncytial trophoblast erodes a path through the endometrium
b. inner cell mass begins to form the placenta
c. maternal blood vessels in the endometrium are walled off from the blastocyst
d. inner cell mass is temporarily deprived of nutrients

12. Under the influence of the trophoblast, maternal blood vessels in the endometrium

a. disappear
b. attach to the inner cell mass
c. break down and form lacunae
d. increase in size and penetrate the blastocyst

13. Separation of the inner cell mass from the trophoblast forms the

a. blastocele
b. lacunae
c. amniotic cavity
d. chorion

14. During gastrulation

a. the blastodisc is formed
b. the placenta is formed
c. germ layers are formed
d. definite organs begin to appear

15. The ectoderm forms

a. muscle
b. blood
c. neural tissues
d. lining of the digestive tract

16. The mesoderm forms

a. muscle
b. skin
c. the brain
d. lining of the digestive tract

17. The chorionic villi

a. form the umbilical cord
b. form the umbilical artery
c. increase the surface area available for exchange between the placenta and the maternal blood
d. form the portion of the placenta called the decidua capsularis

18. The endoderm forms

a. muscle
b. skin
c. the brain
d. lining of the digestive tract

19. The extraembryonic membrane that forms a fluid-filled sac is the

a. yolk sac
b. amnion
c. allantois
d. chorion

20. The hormone that is the basis for the pregnancy test is

a. FSH
b. hCG (human chorionic gonadotropin)
c. LH
d. hPL (human placental lactogen)

21. Each of the following hormones is produced by the placenta except

a. human chorionic gonadotropin
b. human placental lactogen
c. relaxin
d. LH

22. All of the following occur during pregnancy except

a. a woman's respiratory rate and tidal volume increase
b. maternal blood volume increases
c. maternal nutrient requirements increase
d. a woman's heart rate increases

23. During gestation, powerful uterine contractions are suppressed by elevated levels of

a. progesterone
b. estrogen
c. oxytocin
d. prostaglandins

24. The first stage of labor is the ________ stage.

a. dilation
b. expulsion
c. placental
d. decidual

25. The stage of labor during which the fetus emerges from the vagina is called the _____ stage.

a. emergence
b. dilation
c. placental
d. expulsion

26. All of the following occur at puberty, except

a. FSH levels rise
b. LH levels decline
c. gametogenesis begins
d. secondary sexual characteristics begin to become apparent

27. If a sperm cell lacked sufficient quantities of hyaluronidase it would not be able to

a. move its flagellum
b. penetrate the corona radiata
c. become capacitated
d. metabolize the fructose

28. Problems involving the formation of the chorion would affect

a. the embryo's ability to produce blood cells
b. the formation of limbs
c. the embryo's ability to derive nutrition from the mother
d. lung formation

29. Stretching of the cervix would cause an increase in the blood levels of

a. estrogen
b. progesterone
c. oxytocin
d. relaxin

30. An inability of the placenta to produce sufficient amount of relaxin would dictate

a. that labor be induced
b. that a caesarian section be performed
c. that a vaginal delivery would be the only option
d. that an episiotomy should not be performed

Answers

1. d	11. a	21. d
2. a	12. c	22. d
3. d	13. c	23. a
4. c	14. c	24. a
5. a	15. c	25. d
6. b	16. a	26. b
7. a	17. c	27. b
8. b	18. d	28. c
9. c	19. b	29. c
10. c	20. b	30. b