Shared Flashcard Set

Details

Male Reproductive System
Exam 3
158
Science
Post-Graduate
11/08/2011

Additional Science Flashcards

 


 

Cards

Term
testies with seminiferous tubules function
Definition
sperm production
Term
collecting ducts function
Definition
transport and storage
Term
epididymis function
Definition
transport, maturation, and ejaculation
Term
vas deferens function
Definition
transport and ejaculation
Term
seminal vesicles function
Definition
secrete thick liquid to transport sprem
Term
prostate gland function
Definition
secretes thin alkaline solution to neutralise urine and female system
Term
cowper's gland function
Definition
secretes may lubricate, flush out urine or form a gelatinous plug
Term
urethra function
Definition
passage for urine and sperm
Term
penis function
Definition
copulaton (sex)
Term
male urinary bladder and urethra length
Definition
15-16 cm in length
Term
male urinary bladder and urethra travels through
Definition
corpus spongiosum, also the entry point from the urethral gland
Term
Gland of Littre
Definition
urethral gland
Term
Narrowest part of the urethra
Definition
external urethral sphincter; located in the deep perineal pouch
Term
The suspended scrotum will keep the temperature of the testes
Definition
3 degrees Celsius cooler than core body temperature
Term
Lower testes temperature is required for
Definition
sperm development
Term
Raising the temperature of testes will
Definition
reduce sperm production
Term
Scrotum has a muscular wall and in cold weather it will
Definition
contract to keep the temperature from getting too low
Term
Cryptorchidism is
Definition
when the testes fail to descend into the scrotum; 1 or both
Term
Cryptorchidism represents the failure of the testies to
Definition
move or descend during fetal development from an abdominal position through the inguinal canal into the ipsilateral scrotum
Term
Percentage of full term and premature infant boys born with undescended tesis
Definition
About 3%-30%
Term
The most common birth defect of the male genitalia
Definition
cryptorchidism
Term
Siminiferous tubules contain receptor proteins for
Definition
FSH in Sertoli Cells
Term
FSH stimulates
Definition
spermatogenesis to occur
Term
Leydig cells are
Definition
interstitial cells
Term
Leydig cells, LH stimulates the secretion of
Definition
testosterone
Term
Leydig cells contain
Definition
receptor proteins for LH
Term
Spermatogenesis proceeds from the surface of the tubule to the
Definition
lumen
Term
The blood testes barrier is formed by
Definition
Stertoli cells joined by tight junctions
Term
Sertoli cells support and protect
Definition
developing spermatic cells
Term
Sertoli cells secrete
Definition
androgen binding protein and inhibin
Term
Sertoli cells mediate the effects of
Definition
testosterone and FSH
Term
Substances must pass through the Sertoli cells before they can reach the
Definition
developing sperm
Term
The Sertoli cells prevent an
Definition
immune response against the antigens on the sperm cell's surface
Term
Pituitary gland releases
Definition
FSH and LH
Term
FSH will stimulate the
Definition
sperm producing cells in the testes
Term
LH will stimulate
Definition
testosterone producing cells in the testes
Term
Testosterone and sperm producing cells will
Definition
regulate sperm production
Term
Spermatogenesis is the process by which
Definition
spermatogonia develop into mature spermatozoa
Term
Spermatogenesis occurs in the
Definition
testes (seminiferous tubule) and epididymis in a stepwise fashion
Term
Spermatogenesis takes approximately
Definition
64 days
Term
Basal lamina creates
Definition
2 secondary spermatocytes
Term
Lumen spermatogenesis creates
Definition
4 spermatids
Term
Each primary spermatocytes goes through the first meiotic division, meiosis I, to produce
Definition
two secondary spermatocytes,
Term
Meiosis 1 produces chromosomes
Definition
each with 23 chromosomes (haploid). Just prior to this division, the genetic material is replicated
Term
During meiosis I, one chromosome, goes to
Definition
each secondary spermatocyte.
Term
In the second meiotic division, meiosis II, each secondary spermatocyte divides to produce
Definition
two spermatids
Term
Replication during Meiosis 2
Definition
There is no replication of genetic material in this division, but a single-stranded chromatid goes to each cell.
Term
As a result of the two meiotic divisions, each primary spermatocyte produces
Definition
four spermatids.
Term
Chromosome amount of each spermatid
Definition
has 23 chromosomes (haploid), one from each pair in the original primary spermatocyte.
Term
Spermiogenesis is the metamorphosis of
Definition
spermatid into sperm
Term
Spermiogenesis  divisions
Definition
none
Term
Spermiogenesis changes are primarily in
Definition
loss of cytoplasm
Term
Spermiogenesis stage takes
Definition
29 days
Term
acrosome
Definition
package of enzymes at top of sperm; allows penetration of the eggs for fertilization
Term
nucleus
Definition
- positioned in "head" of sperm along just behind acrosome; allows for delivery of DNA to egg
Term
tail
Definition
microtubules arrange to form "flagellum" for locomotion
Term
mitochondria
Definition
located around the base of the tail; provide ATP for the swimming motion
Term
cytoplasm -
Definition
excess cytoplasm in "sloughed off"
Term
1st meiotic division produces
Definition
2 secondary spermatocytes.
Term
2nd meiotic division produces
Definition
4 spermatids
Term
Head Contains
Definition
The nucleus

Acrosomes
Term
The nucleus
Definition
(Contains the 23 chromosomes)
Term
Acrosomes
Definition
contain enzymes that are needed to penetrate the egg
Term
Midpiece contains
Definition
mitochondria
Term
mitochondria provides
Definition
ATP for locomotion
Term
Tail
Definition
a flagellum, propels the sperm
Term
Sperm are produced within the
Definition
seminiferous tubules.
Term
the sustentacular cells
Definition
support and nourish the other cells. Interspersed within the tubules are large cells
Term
The vas deferens empties into the
Definition
the ejculatory duct at the level of the prostrate gland
Term
3 glands near the ejaculatory duct and prostate gland
Definition
seminal vesicle
prostate gland
bulbourethral (Cowper's) gland
Term
Functions of The Seminal Vesicles
Definition
Fructose-rich fluid
Prostaglandins
Term
Fructose-rich fluid in seminal vesicles
Definition
are nutrition for sperm
Term
Prostaglandins function is
Definition
Reacting to the cervix mucus and make it more receptive to sperm movement.
Initiate reverse peristaltic muscle contractions to move the sperm closer to the ovaries.
Term
Functions of the Prostrate Gland:
Definition
Produce Alkaline (basic) fluid: neutralizes the acidity of the vagina.
Term
Ph of the prostate gland
Definition
(pH of 6.0 to 6.5 is needed for the motility of the sperm)
Term
Semen pH
Definition
average is 7.5
Term
An ejaculation releases about
Definition
3.5 milliliter of semen
Term
% that Vas Deferens contributes to semen
Definition
10%
Term
% Seminal vesicles contributes to semen
Definition
60%
Term
% prostate gland contributes to semen to make it more alkaline
Definition
30%
Term
Substances that promote fertilization
Definition
fructose, prostaglandins, zinc, ascorbic acid
Term
In penile erection the arterioles
Definition
dilate and allow special vascular chambers to fill with blood
Term
Erectile tissue
Definition
(2) Corpora Cavernosa, Corpus spongiosum
Term
Nervous system involved in the stimulation of an erection
Definition
parasympathetic S2,3,4
Term
After the parasympathetic stimulation of the penis dilates
Definition
the arterioles of corpus cavernosum
Term
Once the corpus cavernosum dilates blood engorges
Definition
the ventral surface of the penis
Term
The corpus spongiosum provides
Definition
an arterial shunt
Term
Engorgement of blood will compress
Definition
the venous drainage
Term
impotence is
Definition
the inabilitiy to attain/maintain erections
Term
Ejaculation of sperm requires activation from the nervous system of
Definition
Sympathetic
Term
Sympathetic activation of the testes tubules causes
Definition
reproductive glands/ducts to contract peristaltically and bladder sphincter muscle to constrict
Term
When bulbospongiosus muscles contract it will
Definition
expel semen
Term
Erections are controlled by the
Definition
hypothalamus and the spinal cord
Term
Erections increase
Definition
vasodilation of the arterioles
Term
Erections are caused by the
Definition
parasympathetic nervous system
Term
Ejaculation is
Definition
forcible expulsion of semen from the urethra out of the penis
Term
Ejaculation is stimulated by the
Definition
sympathetic nervous system
Term
Spermiogenesis is the
Definition
maturation of haploid spermatids into sperm
Term
Spermatogenesis begins around age
Definition
14 in males and continues throughout life
Term
900 seminiferous tubules empty into the
Definition
epididymis that leads to the vas deferens that enlarges into the deferens ampulla before it joins the body of the prostate
Term
Two seminal vesicles empty into the
Definition
ampulla
Term
all vesicles pass into the
Definition
ejaculatory duct to the internal urethra
Term
The glands that produce mucus throughout the urethral length is
Definition
two Bulbourethral Cowper’s glands
Term
At puberty the hypothalamus releases
Definition
gonadotropin releasing hormone GnRH
Term
GnRH stimulates and produces
Definition
the pituitary and produces LH and FSH
Term
LH causes the increase of testosterone through the
Definition
interstitial cells
Term
If FSH was suppressed and the LH was continued the man would be
Definition
infertile but not impotent
Term
LH/FSH increases
Definition
spermatogenesis
Term
Testosterone inhibits
Definition
GnRH
Term
Testosterone is produced by
Definition
Leydig cells
Term
Leydig cells are essential for
Definition
growth and division of germinal cells
Term
FSH stimulates
Definition
the Sertoli cells to convert spermatids into sperm
Term
Estrogen is formed from
Definition
testosterone by Sertoli cells
Term
Sertoli cells are essential for
Definition
spermatogenesis
Term
LH stimulates the production testosterone by
Definition
Leydig cells
Term
Enzymes in sperm are
Definition
hyaluronidase and proteolytic enzymes
Term
Serm adherance is to the
Definition
ovum zona pellucida
Term
30 min after the sperm adheres to the zona pellucida the head of the sperm will
Definition
fuse with the oocyte to form one cell (fertilization)
Term
Males sperm count is
Definition
60-150 million sperm/ml semen
Term
Oligospermia is
Definition
sperm count of <20 million/ml semen
Term
Oligospermia will cause
Definition
infertility
Term
Half abnormal sperm morphology and motility will equal
Definition
infertility
Term
Azospermia is
Definition
no sperm cells and mutiple WBC
Term
Normal semen motility percentage
Definition
40%
Term
Normal semen morphology percentage is
Definition
14%
Term
Vasectomy is considered a
Definition
permanent method of birth control
Term
Vasectomy is the cutting and tying of
Definition
each ductus (vas) deferens
Term
Vasectomy will interfere with
Definition
sperm transport and may develop anti sperm antibodies
Term
Male sex hormones androgens are
Definition
testosterone, dihydrotostesterone, androstenedione
Term
Testosterone is responsible for
Definition
distinguishing characteristics of the masculine body
Term
In fetal life (7th week) genital ridge produces
Definition
testosterone
Term
Testosterone will develop the
Definition
primary and secondary sexual characteristics
Term
Sperm production starts in boys at
Definition
puberty
Term
Spermatogenesis occurs in the
Definition
seminiferous tubules
Term
Spermatogonia cells start to
Definition
undergo meiosis
Term
Seritoli cells will
Definition
nourish the developing sperms
Term
Interstitial cells outside the tubules produce
Definition
testosterone
Term
Spermiogenesis is involved in the
Definition
maturation of haploid spermatids into sperm
Term
Spermatogenesis begins around age
Definition
14 and continues throughout life
Term
First primary spermatocyte gives
Definition
spermatozoa
Term
First meiotic division occurs in
Definition
meiosis 1 during spermatogenesis (24 days)
Term
2nd meiotic division occurs in
Definition
meiosis 2 during spermatogenesis (24 days)
Term
Spermatogenesis occurs in
Definition
64 days
Term
Sperm containing fructose and prostaglandin comes from
Definition
seminal vesicle gland
Term
Blood testis barrier is formed by
Definition
sertoli cells
Term
Variocele is
Definition
"bag of worms"
Term
Testicular cancer with gynaecomastia
Definition
Interstitial Leydig cell tumor
Term
Alpha feto protein tumor marker present in
Definition
Endodermal sinus tumor
Term
Hydrocele is
Definition
patient processes vaginalis
Term
Embryonal carcinoma is
Definition
tumor associated with human chorionic gonadotrophin hormone
Term
Seminoma is
Definition
the most common testicular cancer
Term
if FSH was suppressed and LH continued
Definition
the man would be infertile but not impotent
Term
Sperm production starts in boys at
Definition
puberty
Term
In the 7th week of fetal life the genital ridge produces
Definition
testosterone
Term
In regards to uncorrected cryptorchidism the testes will not be able to produce sperm, but are able to produce
Definition
Testosterone
Term
The main function of the interstitial cells of Leydig is to produce
Definition
Testosterone
Term
The main function of inhibin produced by the sertoli cells is to inhibit
Definition
FSH
Term
Is division involved with the metamorphosis of spermatid into sperm
Definition
no
Supporting users have an ad free experience!