Contractility of Seminiferous Tubules as Related to Sperm Transport in the Male

摘要: The mammalian testes have several mechanisms to propel the nonmotile spermatozoa in seminiferous tubules through rete testis into epididymis. These include (a) contractions of testicular capsule and (b) fluid flow excurrent ducts resulting from active transport fluids electrolyte extracellular space. efflux sperm appears closely parallel spermiation. An increased output may result prostaglandins (PGF2 alpha) possibly oxytocin (not all species respond oxytocin) as a capsular compressing expelling tubules. Seminiferous tubular do not nervous stimulation but are linked PGs cyclic nucleotide generation. They regulated some extent by androgens lesser response 5 alpha-dihydrotestosterone compared testosterone can be explained their interaction with androgen binding protein action on phospholipase A2 activity for PG synthesis.