Human Reproduction

Question 1

Where is the sperm produced?

Answer 1

• The testes

Question 2

How often are eggs produced by a female?

Answer 2

• Produced monthly

Question 3

What is different between when females get their eggs and when males get their sperm?

Answer 3

• Woman are born with their eggs
• Males start producing sperm in puberty and always continue to do so

Question 4

State the diagram of the female reproductive organ?

Answer 4

Question 5

State the diagram of the male reproductive organ?

Answer 5

*

Question 6

How many chromasones does a sperm have?

Answer 6

• 23

Question 7

How many chromosomes will an egg have?

Answer 7

• 23

Question 8

What is external fertilisation?

Answer 8

• This kind of fertillisation takes place outside the body and is therfore called external fertilisation

Question 9

What is internal fertilisation?

Answer 9

• Ejaculate semen inside the females body
• Fertillisation is more likley that external fertilisation

Question 10

How many chormasomes does a noramal human body have?

Answer 10

• 46

Question 11

The sperm (23) egg (23) are two sets of chormasomes. What is this called?

Answer 11

• Diploid cell

Question 12

What do we call half the genetic information required for a human?

Answer 12

Haploid cells

Question 13

What is the first cell formed in fertilisation called?

Answer 13

• Zygote

Question 14

Define fertilisation?

Answer 14

• Fertilisation is the fusion of haploid male and haploid female gametes, restoring the diploid number of chromosomes in the zygote

Question 15

State the sperms journey to the egg…

Answer 15

1. During sexual intercourse the sperm passes along the sperm duct and are mixed with a fluid from the seminal vesicles
2. This mixture is called semen
3. It is egaculated into the vagina of the female out of the urethra
4. The sperm then swims towards the oviducts
5. If the ovum is present fertiliasation will occur and form a zygote

Question 16

What is random fertillisation?

Answer 16

• Produces genetic variation of offspring

Question 17

What happens after the Zygote has been formed?

Answer 17

• Zygote will travel down the oviduct
• During this time it will begin to develop into an embryo and will implant in the lining of the uterus

Question 18

What hormone does placenta secrete?

Answer 18

• Progesterone

Question 19

What does progesterone do?

Answer 19

• Maintains the uterus lining

Question 20

What do we call it when an embryo looks human?

Answer 20

• Foetus

Question 21

What does the amnion secrete? (Fluid)

Answer 21

• Amniotic fluid

Question 22

What is placenta?

Answer 22

• A placenta, connected by an umbilical chord develops from the embryo. The placenta anchors the embryo in the uterus.
• It also allows: - Nutrients and oxygen to move from the mother to the embryo.
  *

Question 23

What effects the timing of the menstrual cycle?

Answer 23

• FSH
• Oestrogen
• LH
• Progesterone

Question 24

Where is FSH secreted?

Answer 24

• Pituitary Gland

Question 25

What is FSH target organ?

Answer 25

* Follical in the ovary

Question 26

What is the effect of FSH?

Answer 26

* Follicle develops and ovum matures

Question 27

Where is Oestrogen secreted?

Answer 27

* Ovary

Question 28

What is Oestrogens target organ?

Answer 28

* Pituitary gland * Uterus lining

Question 29

What effects do Oestrogen have?

Answer 29

* Stimulates LH production * Stops FSH produced * Thickens uterus lining

Question 30

Where is LH secreted?

Answer 30

* Pituitary gland

Question 31

What is LH target organ?

Answer 31

* Follicle in the ovary

Question 32

What effect does LH have?

Answer 32

* Ovulation- follicle on ovary releases mature ovum into oviduct

Question 33

Where is Progesterone secreted?

Answer 33

* Ovary

Question 34

What is Progesterones target organs.

Answer 34

* Pituitary gland * Uterus lining

Question 35

What effect does Progesterone have?

Answer 35

* FSH and LH inhibited * Thickness of uterus lining maintained

Question 36

State the menstrual cycle...

Answer 36

1. Loss of Uterus lining (period) 2. The pituitary gland produces FSH 3. This tells ovary to form a mature egg 4. Follicle develops with the maturing egg inside it 5. Lining of uterus has been repaired and thickened by the hormone Oestrogen 6. As Oestrogen levels rise, stops production of FSH and triggers LH production 7. Egg is released and travels down oviduct to the uterus

Question 37

What effect does puberty have on Boys?

Answer 37

* Voice breaks * Sperm production begins * Facial, armpit and pubic hair grow * Growth and development of genitalia

Question 38

What effect does puberty have on girls?

Answer 38

* Voice deepens but doesn't break * Menstrual cycle begins * Armpit and pubic hair growth * Brests develop