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24 Cards in this Set
- Front
- Back
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What is the role of spermatogonia?
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divide to make sure there are always germ cells, some will become spermatzoa
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Once spermatogonia undergo mitotic divisions they become..
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spermatocytes
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When spermatocytes undergo meiosis what are they?
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spermatids
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at what phase is the sperm cell shaped?
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late spermatogenesis
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Why a bridge between spermatids?
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to share nutrients for X and Y sperm
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Where does oogenesis occur?
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ovaries
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primary oocytes are arrested where?
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beggining of meiosis 1
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Are there such thing ootids?
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no
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When does the second meiotic division in females happen?
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fertilization
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What are the muscles of the scrotum?
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Dartos-makes the wrinkles
Cremaster- pulls the testes up |
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What is the corpus spongiosum?
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surrounds urethra on ventral side
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What is the corpora cavernosa?
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on top of urethra on dorsal side
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What makes up 80 percent of the testis?
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seminiferous tubules
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What are sertoli cells?
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provide nutrients to developing sperm and phagocytos bad sperm, control and regulate spermatogenesis
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What is purpose of laydig cell?
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produce testosterone
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What happens in the epididymis?
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give sperm needed materials, concentrates it and teaches it to swim
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What happens in Ductus (vans) Deferens?
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propel sperm to the urethra, sperm storage site
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What happens at the ejaculatory duct?
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junction of seminal vesicle and vans defrens empties into urethra
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What is the role of the seminal vesicle?
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fructose, secretions from this gland make up half the % of sperm, helps enhance sperm motility
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What is role of prostate gland?
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around urethra, secretes fluid to neutralize acidic vagina, secretes clotting enzyme
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What is role bulbourethra?
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secrete mucus like substance to lubricate urethra and nuetralize acid environment of urethra
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Male repro hormone pathway
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GnRh to FSH and LH. FSH to Sertoli cells, promotes spermatogenisis, inhibin gives negative feedback. LH acts on leydig cells, to testosterone to sertoli cells.
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Function of testosterone prior to birth?
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masculinize the baby
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Function of testosterone after birth?
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maturation and retention of reproductive system, secondary sex characteristics
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