The Menstrual cycle

Question 1

What is the function of the Vagina ?

Answer 1

The opening for the sperm to enter the female reproductive system

Question 2

What is the function of the cervix ?

Answer 2

Separating the uterus from the vagina

Question 3

What is the job of the cervix / womb ?

Answer 3

Muscular organ where the embryo implants

Question 4

What is the job of the Fallopian tubes / oviducts ?

Answer 4

Transport sperm towards the egg and where fertilisation takes place

Question 5

What is the job of the ovaries

Answer 5

organ where the eggs are made and stored. Also produce and secrete hormones

Question 6

What hormone , released by the hypothalamus , triggers of the menstrual cycle

Answer 6

GNRH = Gonadotrophlin releasing hormone

Question 7

Which hormones in the cycle are released by the pituitary gland ?

Answer 7

FSH and LH

Question 8

Which are the ovarian hormones ?

Answer 8

Oestrogen and progesterone

Question 9

what are the three parts of the cycle ?

Answer 9

Ovarian

Menstrual

Hormonal

Question 10

Describe day 0/ 1 of the cycle

Answer 10

Menstruation / FSH secretion increases causing the releases of follicle from ovary

Question 11

Describe Day 1 /13

Answer 11

Oestrogen is secreted from the ovaries and makes the walls thicker ( so the embryo can thicken )

Question 12

Describe day 14 of the cycle

Answer 12

Ovulation ( egg released ) from the folical due to LH

Question 13

Describe day 15 / 22

Answer 13

Progesterone levels increase

it maintains the thickening of the uterus

inhibits FSH

Question 14

Describe day 22/28 in the cycle

Answer 14

The decrease of corpus lutetium make levels of progesterone decrease

Question 15

Describe the 28th day of the cycle

Answer 15

The end of the cycle and the beginning of a new cycle

Question 16

What days is the women potentially able to conceive ?

Answer 16

Days 14 - 17

Question 17

How does pregnancy prevent the cycle from continuing ?

Answer 17

The placentas secretes progesterone to inhibit FSH

The progesterone also keeps the walls of the uterus thick

Question 18

In mammals how could the cycle be prevented artificially ?

Answer 18

You can give progesterone to prevent the menstrual cycle

Question 19

Why is it important that the menstrual cycle is stopped during pregnancy ?

Answer 19

This prevents the walls of the uterus disintegrating

Question 20

How can the prevention of the cycle be given ?

Answer 20

The progesterone can be given like i pill

An implant can also be inserted under the skin to slowly release progesterone to prevent contraception

Question 21

What are the problems with using artificial ways to control fertility ?

Answer 21

Many people reject artificial contraception eg Catholics

Artificial contraception cant prevent STD’s

People have to take it daily which can be an inconvenience

Question 22

Example of a way a mammal prevents a another pregnancy for a few months ?

Answer 22

Women can prevent conception by breast feeding , this causes the secretion of hormones which inhibit FSH