front 1 The master switch gene | back 1 SRY region on the Y chromosome. |
front 2 Role of SRY | back 2 Allows testes to develop. |
front 3 Mullerian ducts are found in | back 3 Females |
front 4 Wolffian ducts are found in | back 4 Males |
front 5 Before sex differentiation we all have | back 5 Urethral folds, urethral groove, genital tubercle, and labioscrotal swelling. |
front 6 DHT stimulates | back 6 development of urethra, prostate, and external genitals. |
front 7 Sertoli cells secrete an | back 7 Anti-mullerian hormone, regression of mullerian ducts. |
front 8 Leydig cells secrete | back 8 Testosterone, supports development of wolffian ducts. |
front 9 Glans area in males form into | back 9 Glans penis. |
front 10 Labioscrotal swelling in males form into | back 10 Scrotum. |
front 11 Urethral folds in males form into | back 11 The shalt of the penis. |
front 12 What is the first sign of puberty? | back 12 Increased LH levels at night. |
front 13 First characteristic of the male to develop in puberty | back 13 Testes develop. |
front 14 Second characteristic of the male to develop in puberty | back 14 Pubic hair development. |
front 15 Third characteristic of the male to develop in puberty | back 15 Penile development. |
front 16 Fourth characteristic of the male to develop in puberty | back 16 Height spurt. |
front 17 Sperm production occurs in | back 17 The seminiferous tubules within the testes. |
front 18 Sertoli cell role in spermatogenesis | back 18 Support and provide nutrients to dividing cells. |
front 19 Spermatogonia are | back 19 Sperm stem cells that are 2(n). |
front 20 Spermatogonia cells divide by mitosis to give | back 20 Two daughter cells, one will remain in the basement membrane as a spermatogonium and the other will become a primary spermatocyte. |
front 21 The primary spermatocyte divides by | back 21 Meiosis I into a secondary spermatocyte with (n). |
front 22 The secondary spermatocyte divides by | back 22 Meiosis II into an early spermatid. |
front 23 Role of duct system in males | back 23 Transports and stores sperm, assists in maturation and coveys them into the exterior. |
front 24 Parts of the scrotum | back 24 Scrotal septem, dartos muscle, and cremaster muscle. |
front 25 Scrotal septem | back 25 Divides the two sacs. |
front 26 Dartos muscle | back 26 Bundles of smooth muscle in subcutaneous layer of scrotum. |
front 27 Cremaster muscle | back 27 skeletal muscle, surrounds the testes and is extension of internal oblique muscle. |
front 28 Parts of the testes | back 28 Tunica vaginalis, lobules, seminiferous tublues, and sertolicells. |
front 29 Tunica vaginalis | back 29 A serous membrane that partially covers the testes. |
front 30 Lobules | back 30 Contain seminiferous tubles. |
front 31 Acrosome | back 31 A cap like resicle filled with enzymes to penetrate the oocyte to bring about fertilization. |
front 32 The tail consists of | back 32 The neck, middle piece (contains mitochondria), principle piece (longest part of the tail) and the end piece. |
front 33 What is the basis of how males get secondary sexual characteristics? | back 33 HPG axis - hypothalamus, (anterior) pituitary and gonads. |
front 34 What is the role of the hypothalamus in the development of secondary sexual characteristics? | back 34 Releases GnRH onto the anterior pituitary gland. |
front 35 What is the role of the anterior pituitary gland in the development of secondary sexual characteristics? | back 35 Releases FSH and LH once stimulated by the hypothalamus. |
front 36 What is the role of LH in the development of secondary sexual characteristics? | back 36 Acts on the leydig cells which produce and release testosterone. |
front 37 enzyme 5 alpha reductase converts.. | back 37 Testosterone into DHT. |
front 38 Role of inhibin? | back 38 Inhibits FSH when FSH levels reach too high. |
front 39 Role of FSH in a male | back 39 Acts as an androgen binding protein. This protein carries lipid-soluble hormones around the blood. |
front 40 What is in place to stop testosterone levels reaching too high? | back 40 A negative feed back system, when the level reaches too high it inhibits the amount of GnRH released in the hypothalamus acting on the anterior pituitary. This in turn reduces the amount of LH and FSH produced. |