Exam 3 Flashcards
(19 cards)
Where are sperm developed?
Testes
Where are sperm stored?
Epididymis
What are sperm transported through?
Vas defrens
What is the order of sperm transport from testes to the outer world?
Testes-> epididymis-> ductus defrens -> ejaculatory duct -> prostatic urethra -> membranous urethra -> penile urethra-> outside world
What are the 4 male reproductive glands?
Prostate
Seminal vesicles
Bulbourethral gland (Cowpers)
Urethral glands
What stimulates spermatogonia?
Pituitary gonadotropic hormones
Describe the stages of spermatogenesis?
spermatogonia enlarge to become primary spermatocytes
Primary spermatocytes undergo meiosis I to become secondary spermatocytes
Secondary spermatocytes complete meiosis II to become spermatids
Spermatids differentiate into spermatozoa
What happens in meiosis I? Meiosis II?
Meiosis I: cells become haploid, segregation of homologous pairs
Meiosis II: separation of sister chromatids
__________ refers to the transition between “spermatid” to mature sperm
Spermiogenesis
What is does the head of the sperm consist of?
Condensed nucleus
Thin cytoplasm
Acrosome
What is the acrosome derived from and what does it contain?
Golgi apparatus
Proteolytic enzymes hyaluronidase
What does the tail (flagellum) consists of?
Central microtubule skeleton (axoneme)
Mitochondria in proximal part of the tail
What are the 5 hormones that regulate spermatogenesis?
Testosterone LH FSH Estrogen Growth hormone
_______ secretes testosterone
Leydig cells
_______ is essential for growth and division of testicular germinal cells (first stage of spermatogenesis)
Testosterone
What secretes LH and what is the function of LH?
LH is secreted by Anterior pituitary
Stimulates Leydig cells to secrete testosterone
Where is FSH secreted from and what is its function?
FSH: from AP
Stimulates Sertoli cells for the process of spermatogenesis
Sertoli cells produce small amounts of _______ from testosterone in response to ______
Estrogen
FSH
________ is required for support of gonad metabolic funciton in general
Growth hormone
