Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove Ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Male reproductive

QuestionAnswer
gametes = haploid cells produced for sexual reproduction; male= sperm, female= egg
gonads = produce gametes; male= testis, female= ovary
SRY gene testis determining factor; the indifferent gonad --> becomes testis and secretes TESTOSTERONE and MULLERIAN INHIBITING FACTOR (mullerian duct develops in males, absent in females)
mullerian inhibiting factor (MIF) stimulates degeneration of female (Mullerian) ducts --> becomes uterine tube & uterus
testosterone stimulates development of male reproductive structures
homologous structures: genital tubercle penis or clitoris
homologous structures: urogenital folds ventral penis or labia minora
homologous structures: labioscrotal folds scrotum or labia majora
gubernaculum "pulls" gonads down (from thoracic region to pelvic cavity) --> testes pulled through INGUINAL CANAL: testes extended through SCROTUM; failure= sterility
puberty Period of onset of GONADOTROPIN secretion (including FSH and LH) until first menstrual period (females; 12 yrs) or ejaculation of sperm (males; 13 yrs)
GnRH from HYPOTHALAMUS; =gonadotropin-releasing hormone, stimulates FSH & LH
FSH & LH secreted from... anterior pituitary
LH stimulates... LH (in response to GnRH) → stimulates interstitial cells of testes → secrete testosterone
FSH stimulates... SUSTENTACULAR CELLS --> secrete androgen-binding protein (ABP) into lumen of seminiferous tubules
effects of testosterone on body growth of the sex organs, body growth, dihydrotestosterone (DHT) --> development of the pubic, axillary, and facial hair and apocrine glands, rising rate of sperm production, stimulates BRAIN and awakens the LIBIDO (sex drive)
FSH & LH negative feedback TESTOSTERONE (stimulates LH) = inhibits GnRH secretion by hypothalamus & GnRH sensitivity of pituitary; SUSTENTACULAR cells= secrete INHIBIN --> limits FSH production
spermatogenesis =process of sperm production: from MEIOSIS to SPERMIOGENESIS, 1st location = yolk sac --> colonize gonads --> spermatogonia
meiosis diploid cell 2n (23 PAIRS of chromosomes) --> 4 HAPLOID cells (23 unpaired chromosomes); # chromosome is halved, CROSSING OVER occurs
test question: spermatogenesis vs. spermiogenesis spermatogenesis= production of sperm; spermiogenesis= process within spermatogenesis
formation of 4 spermatids (spermatogenesis process) spermatogonia (2n diploid)= stem cells -->1 PRIMARY spermatocyte enter meiosis I --> 2 SECONDARY spermatocytes enter meiosis II --> 4 spermatids
spermiogenesis = differentiation; spermatid becomes SPERMATOZOON (growth of flagellum, shedding of excess cytoplasm --> MATURE SPERM); occurs in SEMINIFEROUS TUBULES, sandwiched in between SUSTENTACULAR CELLS --> blood-testis barrier
head of spermatozoon ACROSOME (lysosome w/ enzymes to penetrate ovum; bursts open to get sperm to egg), NUCLEUS (form male PRONUCLEUS of zygote), BASAL BODY (centriole from which flagellum is formed)
semen =sperm-containing fluid = mix of secretions from seminal vesicle, prostate, seminiferous tubules
Created by: kpan