Chapter 4 Flashcards
Name the 9 organs that form the male reproductive system
scrotum testes epididymis vas deferens prostate seminal vesicles cowper's glands urethra penis
Describe the anatomy of the scrotum
a sac composed of skin, fascia, and smooth muscle (dartos muscle).
Supports the testes with optimum temperature to produce spermatoza
Where does the production of sperm take place??
Testicles are divided into lobules which then contain sminiferous tubules which are coiled. It is here that soernatigebesis takes place. Sertoli cells in the epithelial lining, support the spermatoza.
What do intersitial cells of leydig produce?
androgen, particularly testosterone.
There are several ducts that carry sperm from the seminiferous tubules to the exterior of the body. Name them (4)
- epididymis- a coiled tube that runs along the posterior side of the testis,
- Vas deferens0 con;t of epi, within spermatic cord- which also contains blood, vessels, nerves, and cremaster muscle
- ejaculatory ducts- formed by saccular dilation at the end of the vas deferens and the duct of seminal vesivles.
- urethra- tubes that extends from the bladder to the glans penis.
The urethra is composed of 3 parts. Name them-
- prostatic urethra (receives secretions from prostate gland)
- cavernous urethra (surrounded by erectile tissue)
- membranous urethra (surrounded by the external urethral sphincter.
The male reproductive system also includes accessory glands that produce fluids that serve to keep sperm viable and carry them from the body. This mixed fluid is called sperm. Name the 3 accessory ducts
- seminal vesicles- small sacs behind bladder. secrete an aljaline substance that nourish and protect sperm
- prostate gland- the size and shape of the chestnut. Secretes alkaline substance that increases sperm motility and ability to survive acidic environments.
- cowper’s (bulbourethral) glands- Size of a pea. Produce alkaline mucous-containing secretion that lubricates, protects
The penis is composed of 3 parts. Name them
- root-
- body- formed by 3 cylindrical masses of erectile tissue.
- Glans penis- the highly innervated tup of the penis
How is an errection formed?
Arterioles dilate when stimulated, allowing more blood to flow into the veins that can drain away, producing an errection. This is an Autonomic nervous system response.
Which two hormonal systems control the male reproductive system
testicular hormones - testosterone, and androstenedione and dihydrotestosterone
pituitary/hypothalamic hormones
Following puberty, testosterone is responsible for male secondary sexual characteristics…. name them (5)
- growth and development of male genitalia
- male pattern hair distribution
- enlargement of the larynx and lengthening of vocal crds,
- increased sweat and sebaceous gland activity
5;. increaser muscle and bone mass, metabolic activity and RBC mass, and increase O2 capacity
What is GnRH (Gonadotropin releasing hormone)
Its produced by the hypothalamus to stimulate the production of pituitary hormones. Hormones secreted by the pituitary, control androgen production and tesitcular funtion.
What is FSH (follicle stimulating hormones)
produced by pituitary gland and acts on receptors in the seminiferous tubulews to produce spermatoza.
What is LH (luteinizing hormone) - AKA- interstitial cell stimulating hormone
it affects the receptors in the interstitial cells of Leydig to produce and secrete testosterone. Increased lev els of testosterone act to inhibit the secretion of GnRH and decrease production of FSG and LH.
What are the 7 organs that form the female reproductive system?
- ovaries
- fallopian tubes
- uterus
- cervis
- vagina
- external genitalia or vulva
- breast
After puberty, one oocyte is releases from the follicular cells to form primordial follicles. What hormones control its release?
puituitary gonadotropic hormones (GnRH, FSH and LH). The empty follicle undergoes changes to become the corpus Luteum (yellow body). The lutein cells of the corpus luteum produce estrogen and progesterone.
Where foes fertilization of the ova usually take place?
fallopian tube
describe the uterus
hollow, muscular organ. I lies in the pelvis between the rectum and urinary bladder. It is composed of 3 layers
- perimetrium (serosa)
- myometrium (smooth muscle)
- endometrium
The endometrium is composed of epithelial cells and glands, and there are 3 distinct parts. Name them
- fundus- round portion,
- body- thick-walled central portion
- cervix- constricted neck that protrudes into the vagina.
describe the breast
milk-producing glands located on front of chest. They are composed of 15-20 irregularly shaped lobes of glandular tissue, that produce milk when cued by specific hormones after pregnancy.
What are the 5 principale female hormones?
Hypothalamic GnRH, pituitary FSH and LH, as well as estrogen and progesterone secreted by the ovaries.
What does estrogen do to the body?
causes growth of reproductive organs, regulates fat deposition, lipid and calcium metabolism, hypothalamic temperature, vasomotor activity, and the production of vaginal secretions.
Define menopause
one year of amenorrhea (no mentration) in midlife due to the final phase in the maturation of the female reproductive system. Can also be caused by removing ovaries or chemically with medication that interferes with the action of estrogen.
- sxs include: hot flashes, insomnia, night sweats, depression, emotional irritability.
- Tx’ed with HRT-
What is BPH?
when does it occur
what is happening when it occurs?
- benign prostate hypertrophy
- males >45 yo,
- glandylar tissue thickens d/t stimulation by testosterone, producing nonmalignant hyperplasia- exrtra mass pushes on bladder and urethra causing sxs of discomfort and severe complications.
How is BPH treated?
- mild sxs = waiting
-non-invasive Rx that black the action of testosterone. (proscar and avodart, cardura, uroxatreal, flomax) - minimaly invasive: TUMT, TUIP, TUNA, ILC
and VLAP - invasive: TURP- for severe sxs.
Which two medications reduce PSA by 50%?
> > Finasteride and dutasteride. (proscar and avodart)
What is a typically screening test used to evaluate condition of the prostate?
PSA serum levels.
Note it is a prostate-tissue specific agent but not a prostate-cancer specific agent. Using a lower threhold to define and abnormal PSA is helpful, suchs as DRE test, to increase the value of the +ve.
Does the predictive value of a normal PSA change?
Yes, it increases as people age.
In the serum, PSA circulates in two forms, what are they?
- free PSA
- PSA bound to other proteins.
The ration between the two has been used to increase the likelihood of findings cancer when considering a biopsy.
What is protatits
Inflammation of the prostate. It can be acute or chronic., bacterial/nonbacteroial, inflammatory or non-inflammatory.
What is the tx options for pathogen-associated prostatitis-
- antimicrobial drugs / abx > anti-inflammatory agents > surgery
2.
How is a prostate abscess dx?
Ultrasound
What is prostatodynia?
a condition that mimics prostatitis but without evidence of infection or inflammation.
- called chronic nonbacterial prostatitis, or chornic nonbacterial prostatis or chronic pelvic pain synfrom
- tx’ed with sxs relief.
An underlying caused of prostatitis is prostate stones. What is this? how is it dx?
detected via ultrasounds. its causes a blockage of the glandular ducts which builds up the prostatic secretions. These fluids then dry up and calcify
This can harbour pathogens,
difficult to remove, prostatic massage can help break the stones up,
Define Testicular cancer
- highly treatable, with orchiectomy and for advances stages radiation/chemo + therapeutic approaches
- occurs in young men
- sxs, heavy feeling in area of testies
- dx with ultrasound, CT and chest xrays. Blood work is done before surgery
- divided into two kinds
What are the two histologic types of testicular cancer?
- seminoma - sensitive to radiation, 90% cure rates
2. non seminoma, - lower cure rate and depends on stage
What are examples of nonseminoma tumors?
- embryonal carcinoma
- teratoma,
- yolk sac carcinoma
- choriocarcinoma
How is testicular cancer classified?
TNM classification
What is Epididymitis and Orchitis?
infections of the testes and supporting structures.
- bacterial, such as UTI and STD, virusus
- tx’ed with and anti-inflammatories.