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Chapter 27

front 1

1) Stem cell.
2) First cells with n number of chromosomes.
3) Type B spermatogonia.
4) Early spermatids.
5) Primary spermatocyte.

back 1

1. A

2. D

3. B

4. E

5. C

front 2

6) Acrosome.
7) Location of mitochondria.
8) Midpiece.
9) Location of nucleus.
10) Area of compacted DNA.
11) Flagellum.

back 2

1. B

2. A

3. A

4. C

5. C

6. D

front 3

12) The stage called ovulation.
13) Vesicular (Graafian) follicle.
14) Primary follicles.
15) Primordial follicle.
16) Corpus luteum.
17) Mature follicle.

back 3

12. E

13. C

14. B

15. A

16. D

17. C

front 4

1) The dartos and cremaster muscles are important to the integrity of the male reproductive
system. Which of the following is true about the role they play?
A) They contract to push sperm along the ductus deferens.
B) They regulate the temperature of the testes.
C) They are responsible for penile erection.
D) They contract to allow ejaculation.

back 4

B) They regulate the temperature of the testes.

front 5

2) The ability of sperm cells to move along the ductus deferens is due to ________.
A) gravity
B) peristaltic contractions
C) enzymatic activity
D) hormonal action

back 5

B) peristaltic contractions

front 6

3) The ability of a male to ejaculate is due to the action of ________.

back 6

D) the bulbospongiosus muscles

front 7

4) The most important risk for testicular cancer in young males is ________.

back 7

C) nondescent of the testes

front 8

5) Which of the following glands are responsible for 60% of the synthesis of semen?

back 8

C) the prostate

front 9

6) Which of the following hormones controls the release of anterior pituitary
gonadotropins?

back 9

C) GnRH

front 10

7) Development of male reproductive structures depends on which of the following events?

back 10

C) secretion of male hormones prenatally and lasting into the first few months after birth

front 11

8) The primary function of the uterus is to ________.

back 11

D) receive, retain, and nourish a fertilized ovum

front 12

9) Why is the bloodtestis
barrier important?

back 12

A) because spermatozoa and developing cells produce surface antigens that are recognized
as foreign by the immune system

front 13

10) The structures that receive the ovulated oocyte, providing a site for fertilization, are
called the ________.

back 13

B) fallopian tubes

front 14

11) If gametes were diploid like somatic cells, how many chromosomes would the zygote
contain?

back 14

A) twice the diploid number, and with every succeeding generation, the chromosome
number would continue to double and normal development could not occur

front 15

12) Human egg and sperm are similar in that ________.

back 15

C) they have the same number of chromosomes

front 16

13) The constancy of the chromosome number from one cell generation to the next is
maintained through ________.

back 16

B) meiosis

front 17

14) Fertilization generally occurs in the ________.

back 17

D) fallopian tubes

front 18

15) Spermiogenesis involves the ________.

back 18

C) formation of a functional sperm by the stripping away of superfluous cytoplasm

front 19

16) All of the following can be considered male secondary sex characteristics except the
________.

back 19

C) development of testes as opposed to ovaries

front 20

17) In humans, separation of the cells at the twocell
state following fertilization may lead to
the production of twins, which in this case would be ________.

back 20

B) identical

front 21

18) Characteristics of the mature sperm include the ________.

back 21

B) presence of Y chromosomes in approximately half the sperm

front 22

19) How do the testes respond to exposure to excessive body warmth?

back 22

B) They move away from the pelvic cavity.

front 23

20) Effects of estrogen include ________.

back 23

C) growth of the breasts at puberty

front 24

21) Secretion of progesterone stimulates ________.

back 24

B) preparation of the mammary glands for lactation

front 25

22) Which of the following statements about sperm is not true?

back 25

B) They are sluggish in an alkaline environment.

front 26

23) The cells that produce testosterone in the testis are called ________.

back 26

D) interstitial cells

front 27

24) The testicular cells that construct the bloodtestis
barrier are the ________.

back 27

C) sustentacular cells

front 28

25) Which of the following occurs as a result of undescended testes?

back 28

C) Inadequate or nonviable sperm will be produced.

front 29

26) Erection of the penis results from ________.

back 29

D) a parasympathetic reflex

front 30

27) Which is not a part of the proliferative phase of the female menstrual cycle?

back 30

C) corpus luteum

front 31

28) Which of the choices below is not a function of the vagina?

back 31

A) serves as a passageway for the primary oocyte

front 32

29) Select the correct statement about male sexual response.

back 32

B) Erection is the result of vascular spaces in the erectile tissues filling with blood.

front 33

30) Which of the choices below is not a function of testosterone?

back 33

D) stimulates mammary gland development

front 34

31) Which male hormone inhibits the secretion of FSH?

back 34

B) inhibin

front 35

32) During the secretory phase of the menstrual cycle ________.

back 35

B) progesterone levels are at their highest

front 36

33) Select the correct statement about the uterine cycle.

back 36

D) If fertilization occurs, the corpus luteum is maintained by a hormone secreted by the
developing embryo.

front 37

34) Which of the choices below is not a part of the braintesticular
axis?

back 37

C) thalamus

front 38

35) Which of the following statements is true concerning the mammary glands of both males
and females?

back 38

D) The mammary glands are modified sweat glands that are actually part of the
integumentary system.

front 39

36) Normally menstruation occurs when ________.

back 39

B) blood levels of estrogen and progesterone decrease

front 40

37) The basic difference between spermatogenesis and oogenesis is that ________.

back 40

C) in oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperm
are produced from the parent cell

front 41

38) Occasionally three polar bodies are found clinging to the mature ovum. One came from
an unequal division of the ovum, but from where did the other two arise?

back 41

C) The first polar body has also divided to produce two polar bodies.

front 42

39) Which of the following will occur after ovulation?

back 42

B) The endometrium enters its secretory phase

front 43

40) Why doesn’t semen enter the urinary bladder during ejaculation?

back 43

C) The smooth muscle sphincter at the base of the urinary bladder closes.

front 44

41) Spermatogenesis ________.

back 44

B) involves a kind of cell division limited to the gametes

front 45

42) Which hormone is absolutely necessary for ovulation to occur?

back 45

A) LH

front 46

43) The braintesticular
axis ________.

back 46

B) involves FSH and LH release

front 47

44) Select the correct statement about testosterone control.

back 47

A) GnRH from the hypothalamus causes FSH and LH release from the anterior pituitary.

front 48

45) Which of the following is a correct statement about uterine tubes?

back 48

B) The infundibulum is the funnelshaped
region near the ovary.

front 49

46) Select the correct statement about the hormonal events of the ovarian cycle.

back 49

B) High estrogen levels result in a surge of LH release.

front 50

47) Which of these statements about sexually transmitted infections is false?
.

back 50

C) Syphilis is caused by a virus that may lead to death if untreated.

front 51

48) Which of the following statements about spermatogenesis is not true?

back 51

D) Each spermatid forms two sperm.

front 52

49) A boy who has not passed through puberty sustains an injury to his anterior pituitary
such that FSH is no longer released, but LH is normal. After he grows to maturity, one
would expect that he would ________.

back 52

A) be sterile

front 53

50) Which of the following statements about the female reproductive process is not true?

back 53

C) Rebuilding the endometrium is under the control of prolactin.

front 54

51) A low secretion of luteinizing hormone (LH) in the normal male adult would cause
________.

back 54

A) decreased testosterone secretion

front 55

52) All of the following statements referring to the uterine cycle are true except ________.

back 55

A) FSH and LH directly promote development of the uterine endometrium

front 56

3) Which of the following phases or processes in the monthly reproductive cycle of the
female occur simultaneously?

back 56

D) regression of the corpus luteum and a decrease in ovarian progesterone secretion

front 57

54) The duct system of the male reproductive system does not include the ________.

back 57

D) corpus spongiosum

front 58

55) An ovulating oocyte is actually activated by hormones about ________ days before
ovulation.

back 58

D) 110

front 59

56) Prostate cancer is _______.

back 59

B) sometimes a slow growing cancer that may never represent a threat to the patient