exam 4

Question 1

the __ is the gonad and the __ is the gamete .

Answer 1

testes, sperm

Question 2

which of the following is generally accepted as a secondary sex characteristic?

Answer 2

enlargement of breasts

Question 3

which of the following are primary sex organs?

Answer 3

gonads (testes and ovaries)

Question 4

which of the following is a second sex organ?

Answer 4

vagina

Question 5

whether an organism will be genetically male or female is determined by ___.

Answer 5

sperm

Question 6

the gene that codes for the testis-determination factor (TDF) is found in or on the ___.

Answer 6

Y chromosome

Question 7

the penis is homologous to the __.

Answer 7

clitoris

Question 8

the ___ is an example of the female external genetalia.

Answer 8

clitoris

Question 9

descent of the testes is stimulated by the ___.

Answer 9

testosterone

Question 10

the deep region of the penis, surrounding the urethra, that engorges with blood during an erection is known as the ___.

Answer 10

Corpus sponginosum

Question 11

when it is cold, the ___ contracts and draws the testes closer to the body to keep them warm.

Answer 11

cremaster muscle

Question 12

which of the following is not a change in the male body that results from puberty?

Question 13

the process of spermatogenesis ad spermiogenesis begins with a ___ and end with four ___.

Answer 13

germ cells, gametes

Question 14

___ have 46 chromosomes, whereas ___ have 23

Answer 14

primary spermatocytes, spermatids

Question 15

which of the following is not a function of the nurse cells?

Answer 15

secrete testosterone

Question 16

which of the following is a part of the internal female genitalia?

Answer 16

vagina, cervix, uterus, fallopian tubes, and ovaries

Question 17

in which structure does fertilization usually occur?

Answer 17

uterine tube

Question 18

what structure leads from each ovary to the uterus?

Answer 18

uterine tubes, fallopian tube

Question 19

which of the following is not a component of the vulva?

Answer 19

cervix

Question 20

where does an embryo usually attach to its mother?

Answer 20

endometrium

Question 21

what provides most of the natural lubrication during female sexual excitement?

Answer 21

greater vestibular (Bartholin) glands

Question 22

what is the earliest sign of puberty in girls?

Answer 22

breast development

Question 23

which of the following is considered a “feminizing hormone”?

Answer 23

estrogen

Question 24

what is the cessation of menstruation referred to as?

Answer 24

menopause

Question 25

when does oogenesis begin?

Answer 25

before being born, embryonic development

Question 26

what hormone inhibits the secretion of FSH and LH during the female sexual cycle?

Answer 26

estradiol and progesterone

Question 27

indicated phase of menstrual cycle

Answer 27

Proliferative: several follicles are developing an anthem follicular: before releasing of egg, ovulatory: egg release, luteal: after egg release

Question 28

second phase of menstrual cycle

Answer 28

follicular stage (before releasing of egg)

Question 29

third phase of menstrual cycle

Answer 29

luteal (after releasing)

Question 30

first phage of ovarian cycle

Answer 30

follicular phage

Question 31

second phase of ovarian cycle

Answer 31

ovulation

Question 32

which of these blood hormone levels reaches its maximum during the luteal phase?

Answer 32

progesterone

Question 33

the process that makes it possible for sperm to penetrate the egg is called___.

Answer 33

capacitation

Question 34

regarding fertilization, which of the following events happens first?

Answer 34

acrosomal reaction

Question 35

the optimal "window of opportunity" to conceive a child is ___.

Answer 35

days before ovulation to less than a day after

Question 36

out of 300 million ejaculated sperm, only about ___ reach the vicinity of the egg.

Answer 36

3000

Question 37

which of the following lists the stages or structures of prenatal development in the correct order?

Answer 37

zygote, cleavage, morula, blastocyte, embryo, fetus

Question 38

the spheroidal stage of early prenatal development with about 16 to 64 cells is called a(n) ___.

Answer 38

morula

Question 39

twins are produced when a single egg is fertilized are called ___ twins. twins produced from two eggs ovulated at the same time are called ___ twins.

Answer 39

monozygotic, dizygotic

Question 40

in blastocyst, the trophoblast will become ___, whereas the embryoblast will become___.

Answer 40

part of placenta, the embryo

Question 41

the ___ begins to develop about 11 days after conception, and is the sole source of fetal nutrition from the end of week 12 until birth

Answer 41

placenta

Question 42

where are follicles located?

Answer 42

surrounding tunica albulginea or cortex of ovary

Question 43

which hormone acts primarily on the uterus?

Answer 43

progesterone

Question 44

function of HCG

Answer 44

true

Question 45

describing the development of external genitalia in the female uterus

Answer 45

The absences of testosterone causes fetus to develop female genitalia (T)