male reproductive system

Question 1

acrosome of sperm

Answer 1

covers 2/3 of nucleus and is a vesicle filled with enzymes that help sperm penetrate a secondary oocyte for fertilization

Question 2

spermatogonia

Answer 2

the start of spermatogenesis at basement membrane of seminiferous tubule of the testes. Contains the diploid (2n) number of chromosomes which is 46.
spermatogonia are stem cells and they undergo mitosis

Question 3

primary spermatocytes

Answer 3

spermatogonia that underwent mitosis and differentiated.
still diploid (2n)
shortly after it begins to replicate its DNA and meiosis begins

Question 4

secondary spermatocytes

Answer 4

are the two cells formed by meiosis I
each has 23 chromosomes, the haploid number (n)

Question 5

spermatids

Answer 5

are the four haploid cells resulting resulting from meiosis II
half of the sperm contain x chromosome and half contain a y chromosome

Question 6

spermiogenesis

Answer 6

the final stage of spermatogenesis and is the maturation of haploid spermatids into sperm

Question 7

nurse cells

Answer 7

dispose of excess cytoplasm that sloughs off from a newly developed sperm cell
nourishes sperm and secretes inhibin which inhibits fsh to regulate the rate of spermatogenesis

Question 8

spermiation

Answer 8

sperm released from their connections to nurse cellls

Question 9

when can sperm swim?

Answer 9

at sperm maturation in the epididymis

Question 10

sperm maturation

Answer 10

sperm aquires motility and ability to fertilize ovum

Question 11

testosterone

Answer 11

steroid hormone made from cholesterol in testes and is principal androgen. it is lipid soluble.
testosterone controls the growth, development, and maintenance of sex organs

Question 12

where is sperm made?

Answer 12

in the seminiferous tubules

Question 13

gametes

Answer 13

secondary oocytes and sperm

Question 14

where does spermatogenisis occur?

Answer 14

in the seminferous tubules of the testes

Question 15

spermatogenesis

Answer 15

whee immature spermatogonia develop into sperm

Question 16

what does a mature sperm consist of?

Answer 16

a head and a tail

Question 17

LH stimulates in males?

Answer 17

production of testosterone

Question 18

FSH and testosterone stimulates?

Answer 18

spermatogenesis

Question 19

urethra in males is divided in 3

Answer 19

1. prostatic
2. membranous
3. spongy urethra

Question 20

course taken by sperm cells from site of origin to exterior

Answer 20

seminiferous tubules in testes, efferent ducts, epididymus, ductus vas deferens, ejaculatory duct, urethra

Question 21

spermatogensis cycle

Answer 21

spermatogonia (2n) at basement membrane of seminferous tubules go through mitosis and differentiate into a primary spermatocyte
primary spermatocyte (2n) replicate its DNA and undergo meiosis I where it splits into 2 haploid secondary spermatocytes.
secondary spermatocytes undergo meiosis II where it divides into 4 spermatids (n).
spermatids undergo spermiogensis and mature into sperm cells (n) haploids

Question 22

epididymus

Answer 22

site of sperm cell maturation

Question 23

stereocilia

Answer 23

on the surface of columnar cells in the epididymus

Question 24

urethra

Answer 24

is the shared terminal duct of the genital and urinary systems

Question 25

prepuce

Answer 25

loosely fitting skin covering the glans penis