kumari 3.1 Flashcards Preview

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Flashcards in kumari 3.1 Deck (20):
1

what generates the male gametes?

gonads (testes)

2

what maintains male gametes in quiescent environment and proved vehicle for transport?

interal repro tract and accessory sex glands

3

what 2 things are required for a man's Y chromosome to gain motility?

fertility and power

4

where is the site of androgen biosynthesis in the testes?

Leydig cells

5

leydig cells are where?

intertubular

6

sertoli cells are where?

intratubular

7

which cells are the supporting cells or nurse cells?

sertoli cells

8

what do sertoli cells produce?

estradiol, DHT and inhibin

9

tight junctions or the zonula occludens between adjacent sertoli cells constitute what?

the blood-testis barrier

10

the germ cells in mitosis are in which compartment>

basal compartment

11

the germ cells in meiosis are in which compartment?

adluminal compartment

12

what is spermiation?

after spermiogenesis, sperm are released into the lumen of the seminiferous epithelium

13

T/F: the germs cells that began developing together will mature in synchrony?

True

14

wave of spermatogenesis is a concept in

space

15

the seminiferous epithelial cycle is a concept in

time

16

can the duration of spermatogenesis be altered by hormonal treatment, changes in temp, etc?

no

17

what are the spermatonial mitotic divisions controlled by?

germ cell:Sertolic cell ratio

18

what is the CEILING EFFECT for sperm output?

Sertoli cells can supposrt only a fixed number of germ cells

19

what is the optimal thermal environment for normal spermatogenesis?

32 degree C
-(~5 degrees C below body temp)

20

what regulates testis temp?

scrotum
pampiniform plexus