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47 Cards in this Set
- Front
- Back
What 2 organs are included in the external genitalia?
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Penis
Scrotum |
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What are the 3 accessory glands?
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Seminal vesicles
Prostate gland Bulbourethral gland |
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Sperm is ejected through the u.........
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urethra
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What does the scrotum hold?
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testes
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Sperm develops at body temperature. true or false?
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False.
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Testes comprise of how many compartments?
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250 - 300 compartments
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What are the 2 types of cells in the testis?
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Leydig cells
Sertoli cells |
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Where are the leydig cells located?
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between the spaces between tubules
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What is secreted by the leydig cells?
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testosterone and other androgens
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Sertoli cells are epithelial cells. True or false?
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True
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What is the function of sertoli cells?
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mature sperm and control development of sperm
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Where are mature sperm located?
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In the lumen of the tubule
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What is the function of smooth muscles in the seminiferous tubules?
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To propel sperm and fluid along the tubes through peristaltic contractions
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Each sertoli cells are joined to its neighbours by ............
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tight junction
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The tight junction and the sertoli cells forms the ........
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blood testis barrier
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What is the function of the blood testis barrier?
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To prevent the sperm cells from attacks from the male immune system
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Sertoli cells secrete ...... fluid in which sperm develops
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luminal
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Sertoli cells secrete .........-binding proteins
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androgen
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Which chemical is secreted by sertoli cells that has a negative feedback on FSH only?
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Inhibin
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What is the chemical secreted by the sertoli cells which causes development of male reproductive physiology in male embryos?
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Mullerian inhibiting substance (MIS)
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Seminiferous tubules is connected to the ........ testis
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Rete testis
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Rete testis is connected to the ....... ductubles
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Efferent ductubles
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What is connected to the efferent ductubles and the Vas deferens?
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Epididymis
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What joins the Vas deferens to make the ejaculatory duct?
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Seminal vesicles
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The ejaculatory duct passes the prostate gland and makes the big tubule called
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Urethra
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What is the last gland the sperm passes through?
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bulbourethral gland
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What are the 3 accessory glands?
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Seminal vesicles
Prostate gland Bulbourethral gland |
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What is the function of seminal vesicles?
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To secrete an alkaline fluid with fructose, enzymes and prostaglandins
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What is the function of the prostate gland?
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To secrete citrate and enzymes (that prevents semen clotting) and prostate specific antigen (PSA)
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What is the function of the bulbourethral gland
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To secrete viscous fluid with mucus
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The hypothalamus secretes what hormone that targets the anterior pituitary?
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gonadotrophin releasing hormone (GnRH)
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What is secreted from the anterior pituitary?
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LH and FSH
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FSH targets which cell?
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Sertoli cell
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LH targets which cell?
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Leydig cell
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Sertoli secretes what which causes a negative feedback on FSH only
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Inhibin
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Leydig cells secrete what?
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testosterone
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Testosterone promotes what in skeletal muscles?
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protein synthesis
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Testosterone stimulates secretion of what hormone?
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growth hormone
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What is contained in the head of sperm
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Chromosomes and acrosome
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What is located in the midpiece of sperm?
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Mitochondria
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Indifferentiated germ cells are known as?
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Spermatogonia
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how many meiosis does sperm undergo to mature?
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twice
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Spermatocytes once undergone meiosis II becomes........
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spermatids
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How many chromosomes does a spermatocyte contain?
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46 chromosome
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How many chromosomes does a spermatid contain?
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23 chromosomes
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Spermatids then differentiates into .......... and then released into the lumen
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spermatozoa
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Once sperm enters the lumen of the seminiferous tubule how long does the sperm remain immotile before moving to the epididymis?
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20 days
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