Spermatogenesis Flashcards
what are the phases of spermatogenesis?
golgi, cap, acrosomal, and maturation
heat stress does what to sperm?
decreases spermatogenesis
order of sperm damage during heat stress
- spermatids because they’re undergoing morphological change
- secondary spermatocyte
- primary spermatocyte
**both undergoing meiosis
When and how long will stress effect sperm production in bulls? example: two weeks of heat stress
the damage takes 11 days to appear since it takes that amount of time for sperm to pass through the epididymis
The ____ hooks the sperm tail into the implantation socket of the sperm head
capitulum
Sperm acrosome
enzymes facilitate sperm to penetrate oocyte (hyalurondiase, acrosin)
post acrosomal region
position where sperm attaches head into vitelline membrane of oocyte during fertilization
apical ridge
used as an indicator of viability - when gone, sperm is dead
mitochondrial helix functions to
produce ATP for tail motility
The 9 course outer fibers provide…
structural support, does not contract
The 9 inner double tubules + 2 single fibrils, or the axoneme, function to…
move the tail similarly to cilia/flagella of bacteria, contractions of alpha and beta tubulin fibers
Evaluation of acrosomal integrity
lectins are present that bind glycoproteins on cells
catabolic metabolism properties of sperm
limited life-span, wear out as they metabolize
anabolic metabolism of sperm
trick! sperm are not anabolic and cannot repair themselves
capacitation of sperm
the removal of glycoproteins and seminal plasma that coat the sperm - begins in uterus and ends in oviduct and involves a hyperactive motility
