1. Seeley Essentials of Anatomy and Physiology 6th Edition Chapter 20
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2. Question 1
Sperm are able to increase their motility by lashing their tails because of the influence of
A. progesterone.
B. prostaglandins in semen.
C. high estrogen levels.
D. all of the above

3. Question 2 Fertilization takes place in the ________. A. vagina
B. cervix
C. uterus
D. uterine tube

4. Question 3
Which of the following is thought to be the mechanism by which the sperm enters the egg?
A. An antigen-antibody reaction that briefly alters the cell membrane of the egg.
B. The structure of the cell membrane of the egg allows entry.
C. The head of the sperm has an enzyme that permits digestion through the membrane of the egg to permit a sperm to enter.
D. The mechanism is unknown.

5. Question 4
The stage of development that follows formation of the zygote is the
A. embryonic stage.
B. implantation stage.
C. fetal stage.
D. cleavage stage.

6. Question 5
The beginning of the embryonic stage is marked by the appearance of a
A. solid ball of new cells.
B. hollow ball of cells.
C. hollow ball of cells organized around an inner mass.
D. worm-like structure.

7. Question 6
The hormone that maintains a corpus luteum following implantation is _______.
A. LH
B. HCG
C. progesterone
D. FSH

8. Question 7 Female infertility may be due to
A. hyposecretion of gonadotropic hormones.
B. endometriosis.
C. scarring of the uterine tubes.
D. all of the above

9. Question 8
The layer of the embryonic disk that gives rise to hair, skin, and nails is
A. ectoderm.
B. endoderm.
C. mesoderm.
D. both mesoderm and endoderm.

10. Question 9 Which of the following structures arise from the mesoderm?
A. muscle
B. lining of the mouth
C. lining of the respiratory tract
D. epidermis

11. Question 10 At what time does the embryonic disk become a cylinder?
A. 4 weeks of development
B. 6 weeks of development
C. 8 weeks of development
D. 4 days of development

12. Question 11 The embryonic portion of the placenta is the A. amnion.
B. fetal membrane.
C. allantois.
D. chorion.

13. Question 12 In the embryo, blood cells are primarily formed in the
A. amnion.
B. placenta.
C. allantois.
D. yolk sac.

14. Question 13 The ductus venosus shunts blood around the _______.
A. liver
B. spleen
C. pancreas
D. small intestine

15. Question 14
The substance secreted by the breast immediately following delivery is
A. witches' milk.
B. colostrum.
C. true milk.
D. false milk.

16. Question 15 The primary energy source for the newborn is _______.
A. glucose
B. glycogen
C. fatty acids
D. protein

17. Question 16
Sperm cells reach the upper portions of the uterine tube within an hour after ejaculation.
A. True
B. False

18. Question 17
The product of conception is called a fetus eight weeks after conception.
A. True
B. False

19. Question 18 The corpus luteum secretes both estrogen and progesterone.
A. True
B. False

20. Question 19
Fetal organs are not present until the end of the tenth week of development.
A. True
B. False

21. Question 20
Neonates younger than 24 weeks of gestation and weighing less than 600 grams have almost no chance of survival.
A. True
B. False

22. Answer Key 1. B 2. D 3. C 4. D 5. C 6. B 7. D 8. A 9. A 10. A 11. D