A&P II: chapter 28- the reproductive system
the average length of the menstrual cycle is
28 days
mature ova develop from a pool of oogonia that ____
are foxed at brith with fewer ever developing into a mature ova
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 ____
be sterile
what hormone stimulates follicle growth?
both FSH and estrogens
the accessory reproductive organs include structures that are responsible for ____
both secretion of fluids into the reproductive tract and transport of gametes
the small paired structures at the base of the penis that produce a lubricating secretion are the
bulbourethral glands
the corpus luteum may
degenerate into a corpus albicans if fertilization does not occur be rescued from degeneration by HCG if fertilization occurs
all of the following can be considered male secondary sex characteristics except the
development of testes as opposed to ovaries
which of the following statements about spermatogenesis is FALSE?
each spermatid forms two sperm
The rete testis is connected to the epididymis by
efferent ducts
the rate testis is connected to the epididymis by
efferent ducts
menstruation is triggered by a drop in the levels of
estrogen and progesterone
in the uterine cycle, the proliferative phase is promoted by ____, whereas the secretory phase is promoted by _____
estrogen; progesterone
the developing follicle cells of the ovaries secrete
estrogens
fertilization of an oocyte occurs in the
fallopian (uterine) tubes
oogenesis differed from spermatogenesis in the
final number of gametes produced and timing of meiosis II
the reproductive system includes
gonads, external genitalia, ducts that receive and transport the gametes, and accessory glands and organs that secrete fluids
select the correct statement about the hormonal events of the ovarian cycle
high estrogen levels result in a surge of LH release
estrogens have all of the following functions except
increasing blood cholesterol
the role of follicle stimulating hormone in males is to
initiate sperm production in the testes
all of the following are true of the vagina, except that it
loses a portion of its lining during menstrual flow
the hormonal trigger for menstruation involves a ____
loss of progesterone secretion from the corpus luteum
this hormone stimulates the testes to secrete testosterone
luteinizing hormone
the muscular layer of the uterus is the
myometrium
which of the following statements about oogenesis is FALSE?
oogenesis occurs continuously from puberty until menopause
this organ is composed of three cylindrical masses of erectile tissue each surrounded by a fibrous tissue
penis
sperm are moved along the ductus deferens by
peristaltic contractions
this structure lies posterior to the bladder and anterior to the rectum and secretes an alkaline, fructose filled fluid
seminal vesicle
developing spermatozoa are nourished by the
sertoli cells
inhibit is secreted from the ____ and acts to reduce the secretion of ____
sertolicells: FSH
the function of the epididymis is ____
sperm maturation
the cells that are formed at the end of meiosis are called
spermatids
as developing sperm cells begin the process of meiosis they become
spermatocytes
semen contains all of the following, except
spermatocytes
the stem cells that develop into sperm are called
spermatogonia
these cells may eventually become spermatozoa
spermatogonia
the process of spermiogenesis produces
spermatozoa
the reduction in progesterone and estrogen that occurs at the beginning of the follicular phase is responsible for stimulating follicular development through ____
stimulating the release of FSH
____promotes spermatogenesis
testosterone
the structure that transports the ovum to the uterus is the
uterine tube
which of the following hormones controls the release of anterior pituitary gonadotropins?
GnRH
which of the following will occur after ovulation?
The endometrium enters its secretory phase.
major functions the accessory glands of the male reproductive system include all of the following, except
production of spermatozoa
after ovulation, the corpus lute secretes ____
progesterone
the structure that surrounds the urethra and produces an alkaline secretion is the
prostate gland
which of the following phases or processes in the monthly reproductive cycle of the female occur simultaneously?
regression of the corpus luteum and a decrease in ovarian progesterone secretion
the straight tubules in the testis lead into the ____
rete testis
the ovaries produce
secondary oocytes, estrogen and progesterone
____ represent the first haploid stage of spermatogenesis
secondary spermatocytes
the sustentacular cells of the seminiferous tubules do all of the following, except
secrete testosterone