B5- human reproduction hormones

Question 1

how long is the menstrual cycle?

Answer 1

28 days

Question 2

what is the first hormone released during menstruation? how long does it last?

Answer 2

FSH- day 1-7

Question 3

what is the second hormone secreted during menstrual cycle? how long does it last?

Answer 3

oestrogen: Day 7-14

Question 4

what is the third hormone secreted during the menstrual cycle? how long does it last?

Answer 4

LH: Day14

Question 5

what is the fourth hormone secreted during the menstrual cycle? and how long for?

Answer 5

Progesterone: Day14-28

Question 6

what does FSH do?

Answer 6

causes egg to mature in ovary & stimulates the ovaries to release of oestrogen

Question 7

what does oestrogen do?

Answer 7

stops FSH (so only 1 egg mature in cycle) repairs and thickens the uterus lining & stimulates pituitary gland to release LH

Question 8

what does LH do?

Answer 8

triggers ovulation (release of an egg)

Question 9

what does progesterone do?

Answer 9

maintains the lining of the uterus during middle part of menstrual cycle and during pregnancy. stops FSH from being produced

Question 10

which hormones are released from pituitary glands

Answer 10

FSH, LH

Question 11

which hormones are released from the ovaries?

Answer 11

oestrogen, progesterone

Question 12

what is a contraceptive?

Answer 12

method to prevent pregnancy, can be hormonal + non-hormonal

Question 13

what are hormonal contraceptions?

Answer 13

contains oestrogen + progesterone, only works by preventing LH and FSH

Question 14

what is barrier contraceptives?

Answer 14

prevents sperm from reaching egg > fertilisation

Question 15

what is intrauterine devices? (IUD)

Answer 15

works by killing sperm, preventing implantation of embrey-lasts 5-10 years

Question 16

what do fertility drugs include?

Answer 16

LH & FSH

Question 17

What is the process of IVF?

Answer 17

1)hormones to stimulate egg production (FSH LH)
2) multiple eggs taken from ovaries
3)sperm cell taken + prepared
4)sperm + egg cell form embryo (fertilisation)
5) embryos developed in vitro, 24-48 hours 37C
6) embryos implanted back into uterus

Question 18

List hormonal contraceptives

Answer 18

-Copper IUD- releases P
-contraceptive implant- releases P last 3 years
-injection- P 2-3 months
-patch: releases P + Eo, last 1 week
-the ‘pill’ releases P + eo, side effect headache + nausea 99% effective
just P pill, less side effect, 99% effective

Question 19

what are 3 non-hormonal contraceptives:

Answer 19

-condom
-diaphragm: typically used with spermicide
-sterilisation, Female: tying fallopian tube
male: cutting and tying sperm ducks