5.3.1 hormones in human reproduction

Question 1

what does reproductive hormones cause in puberty

Answer 1

secondary sex characteristics

Question 2

what reproductive hormone do men produce

Answer 2

testosterone produced by testes

Question 3

what reproductive hormone do women produce

Answer 3

oestrogen produced by the ovaries

Question 4

what does oestrogen play a role in

Answer 4

menstrual cycle and breast development

Question 5

what is ovulation

Answer 5

eggs in the ovaries begin to mature and one is released approximately every 28 days

Question 6

how many stages are there in the menstrual cycle

Answer 6

4

Question 7

1. what is the first stage of the menstrual cycle

Answer 7

loss of lining in the uterus (menstruation)

Question 8

2. what is the second stage of the menstrual cycle

Answer 8

winning of the uterus starts to thicken

Question 9

3. what is the third stage of the menstrual cycle

Answer 9

14 days in the egg travels down the oviduct towards the uterus (ovulation)

Question 10

4. what is the fourth stage pf the menstrual cycle

Answer 10

the lining is maintained ready to accept fertilised egg

Question 11

what are the four hormones that control the menstrual cycle

Answer 11

FSH, LH, Oestrogen, Progesterone

Question 12

what does FSH do

Answer 12

causes maturation of an egg in the ovary

Question 13

what does LH do

Answer 13

stimulates the release of the egg

Question 14

what do oestrogen and progesterone do

Answer 14

involved in maintaining the uterus lining with oestrogen created in ovaries and progesterone is a empty egg follicle

Question 15

where is FSH produced and what does it stimulate

Answer 15

it is stored in the pituitary gland and stimulates a the development of a follicle in the ovary

Question 16

what happens inside the follicle and what is produced

Answer 16

an egg matures inside a follicle and oestrogen is produced (FSH stimulates production of oestrogen)

Question 17

what does oestrogen do tp the lining of the uterus

Answer 17

growth and repair of the lining of the uterus wall and inhibits the production of FSH

Question 18

what happens at day 14 when there is a high enough level of oestrogen

Answer 18

it stimulates the release of LH from the pituitary gland which causes ovulation

Question 19

what happens to the follicle

Answer 19

becomes a corpus luteum and starts producing progesterone

Question 20

what does progesterone do

Answer 20

maintains thickness of the uterus wall

Question 21

what happens if there is no fertilisation

Answer 21

corpus lumen breaks down and progesterone levels start to drop

Question 22

what happens when the corpus lumen breaks down

Answer 22

period (menstruation)

Question 23

what happens throughout pregnancy

Answer 23

lining stays same thickness, progesterone is regular produced, and placenta develops

Question 24

differences between FSH and LH

Answer 24

FSH - causes an egg to start maturing in the ovary, It also stimulates the ovaries to start releasing oestrogen

LH - stimulates pituitary gland, when oestrogen
levels have reached their peak
LH causes ovulation to occur and also stimulates the ovary to produce progesterone