A & P 242 Chpt 27 Flashcards


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1

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

A) that the female hormones are suppressed during pregnancy

B) the suppression of inhibin

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

D) that human gonadotropin be synthesized in the first week of the pregnancy

secretion of male hormones prenatally and lasting into the firstfew months after birth

2

Which of the following statements about sperm is not true?

A) They contain very little cytoplasm or stored nutrients.

B) They are sluggish in an alkaline environment.

C) The acrosome is produced by the Golgi apparatus and contains hydrolytic enzymes.

D) The sperm midpiece consists of mitochondria spiraled tightly around the contractile filaments of the tail.

They are sluggish in an alkaline environment.

3

Milk ejection or letdown reflex is stimulated by which of the following hormones associated with pregnancy

A) prolactin
B) gonadotropin
C) oxytocin
D) inhibin

oxytocin

4

True/False

It is necessary for the testes to be kept below body temperature for abundant, viable sperm formation.

True

5

True/False

The amount of testosterone and sperm produced by the testes is dependent on the influence of FSH alone.

False

6

True/False

Pain during ovulation is called dysmenorrhea

False

7

True/False

A human egg or sperm contains 23 pairs of chromosomes.

False

8

True/False

The adenohypophyseal hormone that triggers ovulation is estrogen.

False

9

True/False

Ovulation occurs near the end of the ovarian cycle.

False

10

True/False

Sperm are ejaculated from the corpora cavernosa of the penis.

False

11

True/False

Sperm from the male parent determines the sex of the child.

True

12

True/False

Extremely stressful physical activity in young females can result in excessive bone mass due to large amounts of estrogen production.

False

13

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 are responsible for penile erection.

B) They contract to allow ejaculation.

C) They contract to push sperm along the ductus deferens.

D) They regulate the temperature of the testes.

They regulate the temperature of the testes.

14

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

A) the bulbospongiosus muscles
B) luteinizing hormone

C) the dartos muscle
D) parasympathetic nerves

the bulbospongiosus muscles

15

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

A) smoking
B) sexually transmitted infections

C) a diet high in fat
D) undescended testes

undescended testes

16

Which of the following glands are responsible for 70% of the synthesis of semen?

A) the prostate
B) the seminal vesicles

C) the pituitary
D) the bulbourethral glands

the seminal vesicles

17

The "master switch" for male reproductive development is ________.

A) presence of testosterone
B) the SRY gene

C) inhibition of estrogen
D) lack of an X chromosome

The Sry gene

18

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

A) half the diploid number with no change in development

B) triple the diploid number, and with every succeeding generation, the chromosome number would continue to triple and normal development would not occur

C) There is no relationship between gametes and somatic cells.

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

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

19

Which of the following female structures is homologous to the male scrotum?

A) vagina
B) clitoris
C) labia majora
D) labia minora

labia majora

20

Spermiogenesis involves the ________.

A) formation of four haploid cells from a spermatogonium

B) movement of sperm in the female genital tract

C) sequence of events in the rete testis

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

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

21

Human egg and sperm are similar in that ________.

A) they have the same degree of motility

B) they have the same number of chromosomes

C) they are about the same size

D) about the same number of each is produced per month

they have the same number of chromosomes

22

Effects of estrogen include ________.

A) growth of the larynx
B) deepening of the voice

C)growth of breasts at puberty

D) increased oiliness of the skin

growth of breasts at puberty

23

Which of the following statements about sperm is not true?

A) The acrosome is produced by the Golgi apparatus and contains hydrolytic enzymes.

B) They are sluggish in an alkaline environment.

C) The sperm midpiece consists of mitochondria spiraled tightly around the contractile filaments of the tail.

D) They contain very little cytoplasm or stored nutrients.

They are sluggish in an alkaline environment.

24

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

A) spermatocytes
B) sustentacular cells

C) interstitial endocrine cells
D) spermatogonia

interstitial endocrine cells

25

The testicular cells that construct the blood-testis barrier are the ________.

A) interstitial cells
B) spermatogonia
C) sustentocytes
D) spermatocytes

sustentocytes

26

Erection of the penis results from ________

A)a parasympathetic reflex

B) a sympathetic reflex

C) parasympathetic activation of the bulbourethral glands

D) dilation of the veins in the penis

a parasympathetic reflex

27

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

A) late in this phase, cervical mucus becomes thin and crystalline

B) corpus luteum

C) vesicular follicle growth

D) development of endometrial cells

corpus luteum

28

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

A) serves as the birth canal

B) receives semen from the penis during sexual intercourse

C) serves as a passageway for the primary oocyte

D) serves as a passageway for menstrual flow

serves as a passageway for the primary oocyte

29

During the secretory phase of the menstrual cycle ________.

A) the Graafian follicle forms
B) LH reaches its highest levels

C) estrogen reaches its highest levels
D) progesterone levels are at their highest

progesterone levels are at their highest

30

Normally menstruation occurs when ________.

A) the corpus luteum secretes estrogen

B) blood levels of estrogen and progesterone increase

C) blood levels of FSH fall off

D) blood levels of estrogen and progesterone decrease

blood levels of estrogen and progesterone decrease

31

The basic difference between spermatogenesis and oogenesis is that ________.

A) during spermatogenesis two more polar bodies are produced

B) spermatogenesis involves mitosis and meiosis, but oogenesis involves meiosis only

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

D) the mature ovum is n, while the sperm is 2n

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

32

Which of the following will occur after ovulation?

A) The corpus luteum secretes estrogen only.

B) The corpus luteum prepares to become a corpus albicans.

C) The secretion of anterior pituitary gonadotropins is enhanced.

D) The endometrium enters its secretory phase.

The endometrium enters its secretory phase.

33

Spermatogenesis ________.

A) is the process of releasing mature sperm cells into the lumen of the seminiferous tubule

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

C) uses mitosis to produce gamete cells

D) results in the formation of diploid cells

involves a kind of cell division limited to the gametes

34

Which hormone is absolutely necessary for ovulation to occur?

A) estrogen
B) LH
C) FSH
D) progesterone

LH

35

Which of the following statements about spermatogenesis is not true?

A) The secondary spermatocytes each form two spermatids.

B) The primary spermatocyte forms two secondary spermatocytes.

C) Each spermatid forms two sperm.

D) The spermatogonium forms the primary spermatocyte.

Each spermatid forms two sperm.

36

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

A) The monthly discharge of the uterus (menses) is initiated by the decrease in secretion of female hormones.

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

C) Ovulation usually occurs 14 days after the beginning of menses.

D) Fertilization usually occurs in the fallopian tube.

Rebuilding the endometrium is under the control of prolactin.

37

The duct system of the male reproductive system includes all but which of the following?

A) corpus spongiosum
B) urethra

C) epididymis
D) ductus deferens

corpus spongiosum

38

Prostate cancer is ________.

A) most common in Asians

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

C) often the result of a distortion of the urethra

D) the number-one cause of death in men

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