Lecture 24 - Male Reproductive Physiology Flashcards
What cells are produced in the spermatogenesis?
L24 S4-5
- primordial germ cells (migrate to testes)
- spermatogenia (divide at puberty
- primary spermatocytes
- secondary spermatocytes
- spermatids
- mature sperm
What are Sertoli cells and where are they found?
L24 S9
Found in seminiferous tubules
Surround primary spermatocytes and nurse them through spermatogenesis
Forms estrogen from testosterone
What occurs during spermiogenesis?
L24 S14
- proacrosomal vesicles fuse to form acrosome (contains hyaluronidase)
- nucleus becomes condensed
- centrioles migrate and form flagellum
- mitochondria migrate
- excess cytoplasm is sloughed off
What is the function of the seminal vesicles?
L24 S18-19
Behind the prostate
Secretes:
- fructose (energy for sperm)
- citric acid
- prostaglandins
- fibrinogen
Responsible for 60% of the volume of semen
What is the function of the prostate gland?
L24 S20
Secretes:
- calcium
- citrate ions
- phosphate ions
- clotting enzyme
- profibrinolysin
Slightly alkaline secretion
Responsible for 30% of the volume of semen
What are androgens?
L24 S21
Steroid hormones that have masculinizing effects
Includes:
- testosterone
- dihydrotestosterone
- androstenedione
Synthesized in testes or adrenal gland
What is the function of gonadotropin-releasing hormone?
L24 S27
10 AA peptide
Stimulates anterior pituitary to produce LH and FSH
What is the function of luteinizing hormone?
L24 S27
Glycoproteins
Causes Sertoli cells to secrete testosterone
What is the function of inhibin?
L24 S28
Secreted by Sertoli cells
Inhibits secretion of FSH
What are cells of Leydig and where are they found?
L24 S16
Found in interstitial space of testes
Secrete testosterone
Stimulated by lutenizing hormone
