Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

27 Cards in this Set

  • Front
  • Back
What is the source of hormones in the male reproductive system?
Testes only.
What is the sequence of spermatogenesis?
Stem cells --> spermatogonia --> (primary then secondary) spermatocyte --> spermatid --> mature spermatozoa
During what stage does the first meiotic division occur?
Primary to secondary spermatocytes (4n to 2n, diploid).
During what stage does the second meiotic division occur?
Secondary spermatocyte to spermatid (2n to n, haploid).
What is spermiogenesis?
Remodeling of the spermatid that become flagellated spermatozoa. Nucleus condenses, cytoplasm shrinks, acrosome forms.
What is spermeation?
Flagellated spermatozoa are released from the lumen of seminiferous tubules, leaving behind residual bodies.
What is the function of the epididymus?
Sperm mature and gain motility.
What is the function of the prostate?
Add alkaline nature to neutralize the acidic vaginal environment.
What is the function of the seminal vesicle?
Secretion of prostaglandins to aid contraction of uterus and fallopian tube to aid in sperm movement.
What do inhibin do?
Secreted by Sertoli cells, inactivate the pituitary release of FH/LSH and the hypothalamus release of GnRH.
What is the function of Leydig cells?
Leydig cells increase testosterone production for spermatogenesis (LH stimulates this process).
What is the function of Sertoli cells?
These are nurse cells that coordinate sperm development, and are stimulated by testosterone and FSH. Aid in growth and feeding of sperm, maintenance of testosterone, and conversion to estradiol (aromatase).
What are the negative feedback regulations for testosterone production?
Testosterone will feed back negatively on both the hypothalamus and anterior pituitary.
Testosterone also stimulates inhibin release from Sertoli cells, which suppresses FSH and therefore testosterone production.
What is the negative feedback regulation for tesosterone production?
Testosterone stimulates activin, which suppresses testosterone.
What is FSH specific for in the testes?
Sertoli cells.
What is LH specific for in the testes?
Leydig cells.
What is the function of Leydig cells in androgen production?
LH stimulates the rate-limiting step of the cholesterol --> pregnenolone reaction and stimluate testosterone production.
What is the source of most testosterone synthesis?
Adipose (!), brain, muscle, skin, and (in insignificant amounts) adrenal cortex.
What proteins transport testosterone?
SHBG (Sex Hormone Binding Globulin), albumin, and CBG (Corticosteroid Binding Globulin)
What controls the intracellular conversion of testosterone to DHT?
In what form is testosterone excreted?
17-ketosteroids and DHT.
How would you treat Benign Hypertrophic Prostate (BHP) and/or prostate cancer?
5-α-reductase inhibitors to shut down DHT production. DHT acts to stimulate hypertrophy and hyperactivity in the prostate.
What are the erectile tissues in the penis?
Corpus cavernosa and corpus spongiosum (parasympathetic).
What muscles contract during emission?
Ischiocavernosa and bulbospongiosus (sympathetic).
What is in control of ejaculation?
Voluntary control by spinal cord reflex via the pudendal nerve.
What is hypergonadotropic hypogonadism?
Primary gonadal abnormality in the testes - High FSH/LH, but Low Testosterone/DHT.
(i.e. Klinefelter's)
What is hypogonadotropic hypogonadism?
Secondary (pituitary) or tertiary (hypothalamus) abnormality - Low FSH/LH, and Low Testosterone/DHT.
(i.e. Kallmann's)