reproductive system

Question 1

after how many weeks are the embryos differentiated

Answer 1

5-6 weeks become ovaries or testes
hormones influence what happens next eg testosterone causes different growths

Question 2

7-8 weeks

Answer 2

stretches of male embryo

Question 3

8-9 weeks

Answer 3

female development

Question 4

main structures

Answer 4

gonads (testes or ovaries)
ducts
accessory glands
external genitalia

Question 5

what doe testes produce

Answer 5

spermatozoa

Question 6

what doe testes produce

Answer 6

spermatozoa

Question 7

what do ovaries produce

Answer 7

immature ovum - oocytes

Question 8

why do testes move from inside to outside

Answer 8

due to temperature too hot inside for sperm

Question 9

spermatogenesis

Answer 9

mitosis become diploid = primary spermatocyte
dna replication & synapsis and tetrad formation
meiosis I = secondary spermatocyte
meiosis II = spermatids
spermiogenesis = physical maturation = haploid spermatozoa

Question 10

what’s the first male hormone released

Answer 10

GnRH

Question 11

what does GnRH stimulate

Answer 11

LH and FSH

Question 12

what do LH and FSH stimulate

Answer 12

interstitial cells and seminiferous tubules

Question 13

what do interstitial cells stimulate

Answer 13

secretion of testosterone

Question 14

what do seminiferous tubules stimulate

Answer 14

sustentacular cells

Question 15

what does testosterone stimulate and inhibit

Answer 15

s = muscle growth, bone growth sex characteristics
I = release of GnRH

Question 16

what do sustentacular cells stimulate and inhibit

Answer 16

s = synthesis of ABP and spermiogenesis
I = FSH secretion

Question 17

follicles of ovary

Answer 17

function basic unit

Question 18

phases of ovarian cycle (endometrial changes)

Answer 18

follicular and luteal

Question 19

follicular phase of menstrual cycle

Answer 19

destruction of functional zone and repair
14
egg develops in follicle
due to FSH
produces oestrogen
ovulation at end

Question 20

luteal phase of. menstrual cycle

Answer 20

secretion of endometrial glands
14 days
more constant
progesterone stimulates for conception

Question 21

phases of uterine cycle (body temp changes)

Answer 21

menses
proliferative
(both lower body temp) at ovulation
secretory HIGHER BODY TEMP

Question 22

when does oestrogen rise

Answer 22

during follicular phase

Question 23

when does progesterone increase

Answer 23

luteal phase

Question 24

what does GnRH stimulate (female)

Answer 24

FSH, LH

Question 25

what does FSH stimulate

Answer 25

develop follicles and oestrogen

Question 26

what does LH stimulate

Answer 26

progesterone

Question 27

what does progesterone inhibit

Answer 27

GnRH

Question 28

what does progesterone stimulate

Answer 28

GnRH
bone growth
sex characteristics
maintain glands

Question 29

subtle variation in males

Answer 29

low sperm production due to sex dev genes

Question 30

moderate variation in males

Answer 30

anatomical variation eg urethral opening

Question 31

DSD

Answer 31

ambiguous
hormonal disorder
has a womb and Fallopian tubes

Question 32

subtle variation female

Answer 32

has male sex hormones

Question 33

moderate variation female

Answer 33

premature growth
shutdown ovaries

Question 34

DSD female

Answer 34

small testes
male external genitals
gene SRY

Question 35

ovotesticular DSD

Answer 35

mix chromosomes
ovaries and testes
ambiguous
XY bearing a healthy child