which of the followings glands are responsible for 60% of stythesis of semen
the seminal vesicle
which hormone control the release of of anterior pituitary gonadotropins
GnRH
Developments of male reproductive structure depends on what events
secrete of the male hormones prenatally and lasting into the first few months after birth
the primary function of the uterus is to
receive,retain,and nourish a fertilized ovum
why is blood testis barrier important?
because spermatozoa and developing cell produce surface antigens that are recognized as foreign by the immune system
the structure that receive the ovulates oocyte providing site for fertilization are the
fallopian tubes
if gametes were diploid like somatic cells how many chromosomes would the zygote contain
twice the diploid number and with every succeeding generation the chromosome number would continue to double and normal development could not occur
human eg and sperm are similar in that
they have same number of chromosomes
the dartos and cremaster muscles are important to the integrity of the male reproductive system
they regulate the temperature of the testes
the ability of sperm cells to move along the ducts deferens is due to
peristaltic contractions
the ability of a male to ejaculate is due to the action of
the bulbospongiosus muscle
the most important risk for testicular cancer in young males
sexually transmitted infections
the constancy of the chromosome number from one cell generation to the next is maintained through
meiosis
Fertilization generally occurs in the
fallopian tubes
spermiogenesis involves the
the formation of a functional sperm by the stripping away of superfluous cytoplasm
all of the following can be considered male secondary sex characteristics except the
development of testes as opposed the ovaries
in human separation of the cell as the two cell states following fertilization may lead to production of twins which in this case would be
identical
characteristics of the mature sperm includes the
presence of Y chromosomes in approximately half the sperm
how do the testes respond to exposure to excessive body warmth
the move away from the pelvic cavity
effects of estrogen include
growth of breast at puberty
secretion of progesterone stimulates
preparation of the mammary glands for lactation
Is not true about sperm
the sperm mid piece consists of mitochondria spiraled tightly around the contractile filaments of the tail.
the cells that produce testosterone in the testis are called
interstitial cells
the testicular cells construct the blood testis barrier are the
sustentacular cells
occurs as result of undescended testes
inadequate or nonviable sperm will be produced
erection of the penis results from
parasympathetic reflex
which is not a part of the proliferative phase of the female menstrual cycle
corpus luteum
is not a function of the vagina
serves as a passageway for the primary oocyte
Male sexual response
erection is the result of vascular spaces in the erectile tissues filling with.
Is not a function of testosterone
stimulate mammary glands development
male hormone inhibits the secretion of FSH
inhibin
during the secretory phase of menstual cycle
progesterone levels are at their highest
Uterine cycle
If fertilization occurs the corpus luteum is maintained by a hormone secreted by the developing embryo
is not part of the brain testicular axis
thalamus
the mammary glands of males and females
are modified sweat glands that are actually part of the integumentary system
menstruation occurs when
blood levels of strogen and progesterone decrease
difference between spermatogenesis and oogenesis is that
in oogenesis one mature ovum is produced and in spermatogenesis four mature sperm are produced from parent cell
three polar bodies are found clinging to the mature ovum. One came from unequal division of ovum. from where the other two arise?
the first polar body has also divided to produce two polar bodies
occurs after ovulation
the endometrium enters its secretory phase
semen doesnt enter the urinary bladder during ejaculation
the smooth muscle sphincter at the base of the urinary bladder closes
spermatogenesis
involves a kind of cell division limited to the gametes
hormone absolute necessary for ovulation to occur
LH
the brain testicular axis
involves FSH and LH release
testoterone control
GnRH from the hypothalamus causes FSH and LH release from anterior pituitary
Uterine tubes
the infundibulum is the funnel shaped region near the ovary
hormonal events of ovarian cycle
high estrogen levels result in surge of LH release
False statement about sexual transmitted infections
syphilis is caused by a virus that may lead the death if untreated
Is not true about spermatogenesis
each spermatid forms two sperms
boy who have not passed trough puberty sustain a injury in pituitay gland. FSH not release but LH normal
Be steril
is not true about female reproductive process
rebuilding the endometrium secretion is under the control of prolactin
low secretion of luteinizing hormones LH in normal male adult would cause
decrease testosterone secretion
Not true about uterine cycle
FSH and LH directly promote development of the uterine endometrium
phases or processes in h monthly reproductive cycle of the female occur simultaneously
regression of the corpus luteum and decrease in the ovarian progesterone secretion
the duct system of the male reproductive system does not include
corpus spongiosum
ovulating oocyte is activated by hormones
110 days before ovulation
prostate cancer
sometimes a slow growing cancer that may never represent a threat to the patient
cells on the dorsal surface of the two layered embryonic disc migrate to migrate to form a raised groove known as the
primitive streak
the result of polyspermy in humans is
a nonfunctional zygote
it is impossible for sperm to be functional until after
undergo capacitation
milk ejection or letdown reflex is stimulated by what hormone
oxytocin
prepare mammary glands to secrete
corpus luteum
the placenta is made of a contribution from mother and fetus . which is from fetus
chorion
Hormone relaxing function
relax pubic symphysis
how proteases and acrosin function in reproduction
they act to break down the protective barriers around the eggs allows sperm to penetrate
not a germ layer
epiderm
formation of endodermal and ectodermal germ layers occur at
gatrulation
hormone maintains viability of the corpus luteum
human chorionic gonadotrpin
unlikely method of producing a child
ectopic implatation
Not correct matching of a fetal structure with what it becomes a birth
ductus arteriosus ligamentum teres
implantetion involves
embedding of the blastocyst in the uterine wall
the umbilical arteries carry
waste products to the placenta
sequence of preembryonic
zygote morula blastocyst
Not assessed as part of the apgar score
temperature
hormone for lactation
oxytocin
initially embryo obtain nutrition by
digestion of endometrial cells
doesnt onset labor
aspirin and similar drugs
fertilization
millions of sperms cells are destroyed by the vagina acidic environment
shortly after implantation
The trophoblast forms two distinct layers
the dorsal surface cells of the inner cell of inner cell mass form
the primitive streak
muscle tissue is form
mesoderm
neutral tissue is formed by the
ectoderm
the trophoblast is mostly responsible for forming
placenta tissue
cardiovascular system of newborn must be adjused after first breath also
the ductus arterioso constrict and is converted to ligament arteriosum
sperm movement
reverse peristalsis of the uterus and uterine tubes
after birth expelled
Placenta
Hormone not produce by placenta
inhibin
fetus is delivered
expulsion stage
implantation of the blastocyst is the result of all except
phagocytosis by the trophoblast cells
cleavage as part embryonic development involves
cell division by mitosis little no growth between
pass trough the placenta barries
nutrients respiratory gases wastes and alcohol
not a teratogen
apirin
derivatives of ectoderm
epithelium of the pineal and pituitary glands
derivatives of mesoderm
endothelium of blood and lymph vessel
derivatives of endoderm
epithelium of the respiratory track
developmental events during 9-12 weeks
sex
occurs in fertilization of the ovum occurs and implantation takes place
corpus luteum is maintained until the placenta takes over its hormones producing functions
fetal blood vessel
the umbilical vein becomes the ligament teres
is not true about fertilization event
the two pronuclei divide
the decidua basalis is
located between the developing embryo and the myometrium