Exam 4 Flashcards
When do the gonads differentiate in uterine
Male dependent sex hormones
6-7 weeks testes form with testosterone
6-8 weeks ovaries form in the absence of testosterone
Testes determining factor Testosterone
What hormone stimulates the growth of ovarian follicles
FSH
Which hormone stimulates the production of estradiol by ovaries
LH
Adrenarche
Increased production of adrenal androgens Occurs in both sexes
Gonadarche
Gonadal maturation
Completely separate from Adrenarche
DHEA (androgen)
What leads to ovulation and menstrual cycles
Gonadotropins and hormones
Which hormone stimulates the Leydig cells of the testes to produce testosterone
LH
Which hormone stimulates further growth of seminiferous tubules to increase testicular volume
FSH
Three layers of uterus
Perimetrium, myometrium (muscular), endometrium
What is the inside of the ovary
Medulla
What is the outside of the ovary
Cortex- contains the ovarian follicles and granulosa cells
When one follicle reaches maturation and discharges its ovum through the ovary termed:
Ovulation
What controls the ovarian function
Interaction between pituitary secretion of FSH and LH with secretion of estradiol by the ovarian follicles
Three estrogens
Estradiol
Estrone
Estriol
Estrone
Converted from androgens in the ovaries peripheral metabolite of estrone and estradiol Stimulated by LH
Estriol
The hormone of pregnancy
Progesterone
Mainly male sex hormones
Produced in small amounts in women
Menarche
First menstruation with mature ovum
Phases of menstruation
Proliferating phase- first days
Ovulation- beginning of the luteal (secretory) phase
If no implantation occurs, then menses begins
High level of which hormone stimulates ovum maturation
LH
Which hormone increases body temperature
Progesterone
Body temp. In the follicular phase
98F
What happens to temperature after the LH surge
Average temperature increases
What happens to body temp. At the end of the luteal phase
Body temp declines
Breast tissue can extend into the axils known as
Tail of Spence
Sebaceous glands located in the areola and aid in lubrication of the nipple during lactation
Glands of Montgomery
Which nervous system leads to erect nipples after stimulation
Sympathetic
Gynecomastia
Temporary breast enlargement in males due to hormonal fluctuations
Which sex hormones are produced by the testes
Androgens and testosterone
What is the outer covering of the testes
Tunica vaginalis
What is the inner covering of the testes
Tunica albuginea
What are the seminiferous tubules
Bulk of the testes, site of sperm production
Aka S tubules
Leydig cells purpose
Mainly male sex hormones
Purpose of the epididymis
Seminiferous tubules
Purpose of the vas deferents
Androgens and testosterone
Montgomery
Temporary breast enlargement in males due to hormonal fluctuations
Sympathetic
Bulk of the testes, site of sperm production
Aka S tubules
Androgens and testosterone
Produce androgens, chiefly testosterone
tunica vaginalis
Comma shaped structure that curves over the posterior portion of each testis
tunica albuginea
Storage of sperm
Leydig cells purpose
Secretes fluids for sperm transport
Purpose of the epididymis
Creates an alkaline medium for motility and survival
Purpose of the vas defer-ents
Provides the source of energy for the sperm (fructose)
Sperm enters the pelvic cavity through the
Spermatic cord
What causes the penis erectile reflex
Corpora cavernous and corpus spongiform become engorged with blood
The ____________ causes the arterioles to dilate through the release of ________
Parasympathetic nerves Nitric oxide
Purpose of the prostate gland, two seminal vesicles, and two Cowper glands
Secrete prostaglandins
Secrete mucus into the ejaculate
Purpose of the seminal vesicles
Secrete fluids for sperm transport
What is prostatic fluid
Thin, milky substance with alkaline pH
Bulbourethral glands
Creates clotting enzymes and fibrinolysin to help mobilize the sperm after ejaculation
Aka Cowper glands
Vasectomy
Vasa deferens are severed
Spermatogonia
Primitive male gametes
Spermatogonia develop into ____________ which divide into
Spermatogonia -> primary spermatocytes
Divide into secondary spermatocytes -> then spermatids
Sertoli cells
Cells found within the seminiferous tubules that provide metabolic support for the spermatids
Production of the male sex hormones is controlled by
The H-P-G axis
Where is the primary androgen for males produced
In the Leydig cells in the testes Necessary for external Virilization
Dihydrotestosterone purpose
Maintains biosynthesis of testosterone
Prolactin purpose
Acts on Leydig cells to regulate testosterone secretion
Purpose of LH in males
Acts on Sertoli cells to promote spermatogenesis
Purpose of FSH in males
Secreted by the sertoli
Purpose of inhibit
Inhibits FSH secretion
Perimenopause in females
Ovaries produce high levels of estrogen
Definition of menopause
1 year after the cessation of menstruation
Ovarian changes in aging
Reproductive organ atrophy
Uterine changes in aging
Thinning of vaginal epithelium
Male reproductive aging
Decrease in size starting at 30
Reduced testosterone can cause
Hot flashes, breast tenderness, and migraine headaches