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bio 202 > exam 4 > Flashcards

exam 4 Flashcards

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Biology 101 flashcards
1
Q

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

A

testes, sperm

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2
Q

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

A

enlargement of breasts

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3
Q

which of the following are primary sex organs?

A

gonads (testes and ovaries)

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4
Q

which of the following is a second sex organ?

A

vagina

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5
Q

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

A

sperm

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6
Q

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

A

Y chromosome

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7
Q

the penis is homologous to the __.

A

clitoris

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8
Q

the ___ is an example of the female external genetalia.

A

clitoris

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9
Q

descent of the testes is stimulated by the ___.

A

testosterone

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10
Q

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

A

Corpus sponginosum

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11
Q

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

A

cremaster muscle

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12
Q

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

A
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13
Q

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

A

germ cells, gametes

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14
Q

___ have 46 chromosomes, whereas ___ have 23

A

primary spermatocytes, spermatids

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15
Q

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

A

secrete testosterone

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16
Q

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

A

vagina, cervix, uterus, fallopian tubes, and ovaries

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17
Q

in which structure does fertilization usually occur?

A

uterine tube

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18
Q

what structure leads from each ovary to the uterus?

A

uterine tubes, fallopian tube

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19
Q

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

A

cervix

20
Q

where does an embryo usually attach to its mother?

A

endometrium

21
Q

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

A

greater vestibular (Bartholin) glands

22
Q

what is the earliest sign of puberty in girls?

A

breast development

23
Q

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

A

estrogen

24
Q

what is the cessation of menstruation referred to as?

A

menopause

25
Q

when does oogenesis begin?

A

before being born, embryonic development

26
Q

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

A

estradiol and progesterone

27
Q

indicated phase of menstrual cycle

A

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

28
Q

second phase of menstrual cycle

A

follicular stage (before releasing of egg)

29
Q

third phase of menstrual cycle

A

luteal (after releasing)

30
Q

first phage of ovarian cycle

A

follicular phage

31
Q

second phase of ovarian cycle

A

ovulation

32
Q

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

A

progesterone

33
Q

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

A

capacitation

34
Q

regarding fertilization, which of the following events happens first?

A

acrosomal reaction

35
Q

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

A

days before ovulation to less than a day after

36
Q

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

A

3000

37
Q

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

A

zygote, cleavage, morula, blastocyte, embryo, fetus

38
Q

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

A

morula

39
Q

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.

A

monozygotic, dizygotic

40
Q

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

A

part of placenta, the embryo

41
Q

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

A

placenta

42
Q

where are follicles located?

A

surrounding tunica albulginea or cortex of ovary

43
Q

which hormone acts primarily on the uterus?

A

progesterone

44
Q

function of HCG

A

true

45
Q

describing the development of external genitalia in the female uterus

A

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

bio 202 (3 decks)

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