Flashcards in Male Reproductive Anatomy Deck (46):
Where is sperm stored?
In the tail of the epididymis.
What provides metabolic substrate to the sperm?
Accessory sex glands
What are the 4 accessory sex glands?
What accessory sex gland is missing in the boar?
What 2 accessory sex glands are missing from the tom?
Ampullae and vesicular gland
What accessory sex glands are present in the dog?
Just a prostate
How is the temperature in the testis controlled?
Veins and arteries passing in close proximity in the pampiniform plexus allows heat exchange from the arteries to the cooler veins.
What does the spermatic cord contain?
Vasculature, lymphatics and neural connections and the cremaster muscle.
What 3 things occur in the excurrent duct system?
Final maturation of sperm
Delivery to pelvic urethra
What 3 structures comprise the excurrent duct system?
What is the seminal plasma?
Liquid, non-cellular portion of semen
What produces the seminal plasma?
The epididymus and the accessory sex glands
What are 2 major qualities of a fibroelastic penis?
Limited erectile tissue
What is the major characteristic of a musculovascular penis?
Large corporal sinusoids
What 3 species have a fibroelastic penis?
What 3 species have a musculovascular penis?
What is unique about a boar's penis?
What is unique about a ram and stallion penis?
The urethral process
What is unique about a dog's penis?
The os penis
What special feature does an alpaca penis have?
The cartilagenous process
What does a cat penis have that no other species has?
What are 3 endocrine requirements for spermatogenesis?
FSH and LH secretion from the anterior pituitary
Testosterone and estrogen
What do the Leydig cells do (2 things)?
Have LH receptors
What do the Sertoli cells do (3 things)?
Have FSH receptors
Convert testosterone to estradiol
What does LH do?
Stimulates Leydig cells to produce testosterone
What does FSH do?
Stimulates Sertoli cells to begin spermatogenesis and convert testosterone to estradiol
What systemic effect does testosterone have?
Negative feedback for GnRH (prolongs LH secretion)
What does inhibin do?
Supresses FSH receptors on Sertoli cells
What are the 4 stages of spermatogenesis?
Where does spermatogensis take place?
In the seminiferous tubules
How many spermatids can one spermatogonia produce?
Up to 256
What is the differentiation phase?
When spermiogenesis occurs.
What happens in the golgi phase?
Acrosomic vesicle formation
What happens during the cap phase?
Acrosomic vesicle spreads over the nucleus
What happens during the acrosomal phase?
Elongation of the nucleus and cytoplasm.
What occurs during the maturation phase?
Final assembly to form a spermatozoon.
What are the 4 parts that make up the differentiation phase?
What 3 things are in the head of a spermatozoa?
What 3 pieces make up the tail of a sperm?
Which piece of the tail contains the mitochondria?
The middle piece
What is the duration of spermatogenesis of a bull?
What is the duration of spermatogenesis of a ram?
What is the duration of spermatogenesis of a boar?
What is the duration of spermatogenesis of a stallion?
What 3 hormones are released in pulses every few hours?