Testicular and Ovarian Function Flashcards Preview

Jonathan's Reproduction > Testicular and Ovarian Function > Flashcards

Flashcards in Testicular and Ovarian Function Deck (37)
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1

Where does spermatogenesis occur?

Sertoli cells in seminiferous tubules

2

Which cell produces testosterone in the testes

Leydig cells in the interstitial space

3

What is the name of the sperm cell at the 1) beginning 2)end of mitosis?

1) spermatogonia
2) spermatocyte

4

When does spermatogenesis begin?

puberty

5

How many chromosomes does a primary spermatocyte have?

46, still diploid

6

When does oogenesis occur?

in fetal life. Females are born with all the primary oocytes they have

7

T/F second meiotic division occurs at the time of ovulation

False, it occurs after fertilisation

8

How many mature ovum does a primary oocyte give?

one

9

What are the seven hormones produced by the anterior pituitary

FSH, LH, TSH, ACTH, Prolactin, GH, MSH

10

What are the peptide hormones produced by the female gonads

Inhibin and activin

11

T/F Female reproductive system is responsive to external stimuli

True, hence stress can prevent hormone secretion and ovulation

12

What are the accessory glands the male reproductive system

seminal vesicle
bulbourethral gland
prostate

13

What is the epididymis a site of?

sperm maturation

14

What is the downstream action of LH stimulating Leydig cells

testosterone secretion
sex characteristics development

15

What are the non-reproductive actions of testosterone

closing epiphysis
sebaceous gland secretion

16

Does a male secret inhibin?

Yes, in response to FSH stimulation on sertoli cells. Negative feedback signal will control the level of FSH

17

T/F Only LH in male have a long feedback loop

True, FSH has a short feedback loop with inhibin. LH has a long loop with testosterone

18

What is "menses"

A phase of the menstrual cycle when the endometrium sloughs off

19

What are the cells that can response to FSH/LH in female?

Theca (LH) and granulosa cells (FSH) in the follicle

20

Which cell converts androgen to ostrogen?

granulosa cells, in response to FSH

21

Which hormone does the rising level of ostrogen in proliferative phase inhibit

FSH
LH
GnRH

22

What happens with LH surge?

induce high level of oestrogen secretion, and changes the system to a positive feedback system

leads to ovulation

23

When is inhibin active?

late follicular phase and ovulation

24

Why is there a fall of oestrogen following ovulation?

follicle ruptures and turns into corpus luteum

25

What is the effect of oestrogen on the endometrium?

proliferation of endometrium + expression of progesterone receptor

26

What happens to cervical fluid in response to high oestrogen

it becomes clear and non-viscus, allowing entry of sperm

27

What hormone does the corpus luteum produce?

high level of progesterone and some oestrogen

28

What prevents another follicle from maturating during the luteal phase?

corpus luteum producing progesterone, oestrogen and inhibin to suppress LH, FSH, and GnRH

29

What happens to the uterus during luteal phase?

endometrium becomes vascular and secretory, while cervix becomes thick and sticky

30

in which phase of menstrual cycle does the baseline body temperature rise?

secretory phase, after ovulation