Downing Cells Test 2 Flashcards
Interstitial Cells of Leydig
produce testosterone
Sertoli Cells
Supporting “nurse” cells which the sperm grow in, Produce Inhibin to limit FSH production.
Inhibin
downregulates FSH synthesis and inhibits FSH secretion. Produced by sertoli cells
Spermatogonia
diploid, three types are located at the basement membrane. maturation begins at puberty
Three types of spermatagonia
Dark type A, Pale Type A, Type B
Dark Type A spermatagonia
reserve stem cells
Pale type A spermatagonia
self renewing stem cells
Type B spermatagonia
differentiating progenitors
Spermatocytes
primary are diploid and enter meiosis I
secondary: rapidly enters meisos II
Spermatids
haploid progeny of meiotic divisions
Progression of sperm maturation
Spermatogonia Primary Spermatocytes Secondary Spermatocytes Spermatids Spermatozoa
Spermiogenesis
Maturation of spermatids to spermatozoa. Golgi phase, cap phase, acrosomal phase, maturation phase
FSH function in Males
on sertoli cells, increases testicular fluid production, produces Inhibin and ABP to limit FSH production
LH receptors
In males on Leydig cells, stimulate androgen output
FSH receptors
In males on Sertoli Cells, stimulate androgen binding protein, and high androgen in seminiferous tubule,
