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