Spermatogenesis, oogenesis, and the events of fertilization through implantation tested on USMLE Step 1.
33 cards · basic cards · AI-written, checked twice. Edit anything.
- Where does spermatogenesis occur?
- Seminiferous tubules of the testis
- What are the diploid stem cells lining the seminiferous tubules that give rise to sperm?
- Spermatogonia
- What is the ploidy and DNA content of a primary spermatocyte?
- Diploid, 4N DNA content
- Meiosis I of a primary spermatocyte produces what cell?
- Secondary spermatocyte
- What is the ploidy and DNA content of a secondary spermatocyte?
- Haploid, 2N DNA content
- Meiosis II of a secondary spermatocyte produces what cell?
- Spermatid
- What is the process called that transforms a round spermatid into a mature spermatozoon?
- Spermiogenesis
- About how long does the full process of spermatogenesis take?
- About 64 days
- Which pituitary hormone acts on Sertoli cells?
- FSH (follicle-stimulating hormone)
- What hormone do Leydig cells produce?
- Testosterone
- Which pituitary hormone acts on Leydig cells?
- LH (luteinizing hormone)
- Which organelle gives rise to the sperm acrosome?
- Golgi apparatus
- What is the function of the acrosome?
- Contains hydrolytic enzymes that help sperm penetrate the corona radiata and zona pellucida
- What does the sperm midpiece contain that powers motility?
- Mitochondria
- At what stage of meiosis are primary oocytes arrested from before birth until ovulation?
- Prophase I (diplotene stage)