chapter 27 the reproductive system Flashcards


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1

Genetic variation is NOT enhanced through __________.

mitosis

mutation

separation of homologous pairs in metaphase I

crossing over events

fertilization

a

2

In response to parasympathetic stimulation __________.

vessels in the penis constrict

ejaculation occurs

fertilization is encouraged

blood flow increases to the penis

spermiogenesis is encouraged

d

3

The basic difference between spermatogenesis and oogenesis is that __________.

the mature ovum is haploid and the sperm is 2n

one mature ovum is produced in oogenesis, and four mature sperm are produced in spermatogenesis

the mature ovum is diploid and the sperm is 1n

two more polar bodies are produced in spermatogenesis

spermatogenesis involves mitosis and meiosis, but oogenesis involves meiosis only

b

4

The organ that makes estrogen and progesterone is the __________.

vestibular gland

pineal gland

ovary

hypothalamus

vagina

c

5

The primary sex organ of the male is the __________.

penis

testes

prostate

epididymis

seminal vesicle

b

6

The reason why the testes are suspended in the scrotum is __________.

to reduce the chance of infection from the enteric bacteria

to provide for a cooler temperature

to protect sperm from the immune system

to place sperm storage sites nearer the penis

to create extra space for the sex organs

b

7

The sperm's acrosome __________.

provides the blood-testis barrier

contains enzymes

beats, so that the sperm can swim

has a high density of mitochondria

contains nutrients

b

8

The surge in LH that occurs during the middle of the ovarian cycle triggers __________.

activation of primordial follicles

FSH release

uterine-lining secretion

menstruation

ovulation

e

9

The usual site of fertilization is the __________.

vagina

uterus

vulva

ovary

uterine tube

e

10

The uterine layer shed with each monthly cycle is the __________.

perimetrium

tunica albuginea

basal layer of endometrium

myometrium

functional layer of endometrium

e

11

__________ cells, located between seminiferous tubules, produce testosterone.

Sustentacular

Interstitial

Thalamic

Myometrial

Follicle

b

12

In which uterine phase does the functional layer of the endometrium start to rebuild?

preovulatory

proliferative

secretory

ovulation

menses

b

13

What is the most common bacterial sexually transmitted disease in the U.S.?

gonorrhea

syphilis

vaginitis

chlamydia

genital warts

d

14

Which cell type is actually ovulated from the ovary?

tertiary oocyte

ovum

secondary oocyte

primary oocyte

oogonium

c

15

Which is the most correct sequence of sperm flow in the male duct system?

seminiferous tubules, vas deferens, ejaculatory duct, ampulla, urethra

seminiferous tubules, prostatic urethra, vas deferens, ejaculatory duct, ampulla

seminiferous tubules, epididymis, vas deferens, ampulla, ejaculatory duct, urethra

testes, ductus deferens, urethra, seminal vesicle

testes, epididymis, ductus deferens, urethra, seminal vesicle

c

16

Which male structure is homologous to the female's clitoris?

epididymis

pubis

penis

scrotum

prostate gland

c

17

Which represents a correct cascade of reproductive hormones in males?

FSH, GnRH, LH, testosterone

GnRH, LH/FSH, testosterone, inhibin

LH, GnRH, FSH, testosterone

FSH, LH, GnRH, testosterone

FSH, GnRH, testosterone, LH

b

18

Within the ovary, progesterone is produced by the __________.

secondary follicles

primary follicles

corpus luteum

tertiary follicles

corpus albicans

c

19

Sperm are produced in the __________.

spermatic cord

seminiferous tubules

seminal gland

interstitial cells

prostate

epididymis

b

20

Ovulation in a typical, or "average," cycle usually occurs on day __________.

1

5

14

21

28

c

21

What hormone is responsible for the secondary sex characteristics found in women?

prolactin

progesterone

LH

FSH

estrogen

e

22

If the testes are both removed before puberty, will secondary sex characteristics develop in the male?

Yes, they will develop and the man can produce children.

It is impossible to tell.

No, they won't develop and the man will be sterile.

Yes, they will develop, but the man will be sterile.

c

23

The muscular wall of the uterus is called the __________.

epimetrium

perimetrium

endometrium

myometrium

d

24

Which of the following hormones causes the oocyte to mature?

FSH

LH

estrogen

testosterone

a

25

Which of the following hormones is NOT involved in the regulation of the number of sperm produced in the testes?

gonadotropin-releasing hormone

inhibin

testosterone

PSA

d

26

Which of the following statements about myoid cells is true?

They elevate the testes.

When they contract, they cause wrinkling of the scrotal skin.

They form a straight tubule that conveys sperm into the rete testis.

They surround the seminiferous tubules and contract rhythmically to squeeze sperm and testicular fluid through the tubules out of the testes.

d

27

Which of the following absorb heat from the testes?

the pampiniform plexus

the testicular veins

the interstitial cells

the testicular arteries

a

28

Which of the following structures passes through the inguinal canal?

the prostatic urethra

the ejaculatory duct

the spermatic cord

epididymis

c

29

Which of the following structures makes up most of the male urethral length?

spongy urethra

ejaculatory duct

prostatic urethra

membranous urethra

a

30

All EXCEPT which of the following statements about a vasectomy are true?

It is only about 10% reversible.

It is a highly effective method of birth control.

It is a minor surgical procedure.

The part of the ductus deferens that lies in the scrotum is cut.

a