Chapter 16
(p.377-)
<Understanding Key Terms>
Match the key terms to these definitions．
a. _____________ Release of an oocyte from the ovary.
b. _____________ Female sex hormone that causes the endometrium of the uterus to become
secretory during the uterine cycle; along with estrogen, it maintains secondary sex characteristics in
females．
c. _____________ Thick, whitish fluid consisting of sperm and secretions from several glands of the
male reproductive tract.
d. _____________ Narrow end of the uterus, which projects into the vagina.
e. _____________ Cap at the anterior end of a sperm that partially covers the nucleus and contains
enzymes that help the sperm penetrate the egg.
<Testing Your Knowledge of the Concepts>
12. Label this diagram of the male reproductive system, and trace the path of sperm．
13. Which of these associations is mismatched?
a. interstitial cells -- testosterone
b. seminiferous tubules – sperm production
c. vasa deferentia – seminal fluid production
d. urethra – conducts sperm
14. Follicle-stimulating hormone (FSH)
a. is secreted by females but not by males.
b. stimulates the seminiferous tubules to produce sperm.
c. secretion is controlled by gonadotropin-releasing hormone (GnRH).
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d. Both b and c are correct.
15. In tracing the path of sperm, you would mention the vasa deferentia before the
a. testes.
b. epididymides.
c. urethra.
d. uterus.
16. Semen does not contain
a. prostate fluid.
b. urine.
c. fructose.
d. prostaglandins.
e. Both b and d are correct.
17. The scrotum is
a. part of the primary sex organ．
b. important in regulating the temperature of the testes.
c. poorly innervated．
d. an extension of the spermatic cord.
18. Testosterone is produced and secreted by
a. spermatogonia．
b. sustentacular cells．
c. seminiferous tubules．
d. interstitia lcells.
19. Luteinizing hormone in males
a. stimulates sperm development.
b. triggers ovulation.
c. is responsible for secondary sex characteristics.
d. controls testosterone production by interstitial cells.
20. Secondary sex characteristics are
a. the only body features that regress as we age.
b. the same in males and females．
c. those characteristics that develop only after puberty.
d. the only reproductive structures affected by hormones.
21. The release of the oocyte from the follicle is caused by
a. a decreasing level of estrogen．
b. a surge in the level of follicle-stimulating hormone.
c. a surge in the level of luteinizing hormone．
d. progesterone released from the corpus luteum.
22. Which of the following is not an event of the ovarian cycle?
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a. FSH promotes the development of a follicle．
b. The endometrium thickens．
c. The corpus luteum secretes progesterone．
d. Ovulation of an egg occurs.
23. An oocyte is fertilized in the
a. vagina.
c. oviduct.
b. uterus．
d. ovary.
24. Following implantation, the corpus luteum is maintained by
a. estrogen.
b. progesterone.
c. follicle-stimulating hormone.
d. human chorionic gonadotropin.
25. During pregnancy,
a. the ovarian and uterine cycles occur more quickly than before.
b. GnRH is produced at a higher level than before.
c. the ovarian and uterine cycles do not occur.
d. the female secondary sex characteristics are not maintained.
26. Female oral contraceptives prevent pregnancy because
a. the pill inhibits the release of luteinizing hormone.
b. oral contraceptives prevent the release of an egg.
c. follicle-stimulating hormone is not released.
d. All of these are correct.
27. Which contraceptive method is most effective?
a. abstinence
b. diaphragm
c. IUD
d. Depo-Provera® injection
ln questions 28-30, match each method of protection with a means of birth control in the key.
Key:
a. vasectomy
d. diaphragm
b. oral contraception
e. male condom
c. intrauterine device (IUD)
28. Blocks entrance of sperm to uterus
29. Traps sperm and also prevents STDs
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30. Prevents implantation of an embryo
31. Which of the following may cause an eye infection in newborns delivered to infected mothers?
a. chlamydia
b. gonorrhea
c. AIDS
d. Both a and b are correct．
32. For which of the following infections is there currently no cure?
a. chlamydia
c. syphilis
b. gonorrhea
d. herpes
33. Which of the following is indicative of the third stage of a syphilis infection?
a. chance
b. rash
c. gumma
d. generalized edema
＜解答＞
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