Reproduction

  • Created by: annaquinn
  • Created on: 26-05-18 14:56
What is the female gamete?
Ova
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What is the male gamete?
Sperm
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How many chromosones do they each contain?
23
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What is fertilisation?
When the two nuclei combine
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What type of cell do they form?
Diploid cell
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What name is given to the process of division?
Mitosis
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What are the two main structures of pregnancy?
Uterus and Placenta
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What vessel carries substances from the foetus to the mother?
Umbilical artery
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What substances does it carry?
Urea, Carbon dioxide and other wastes
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What vessel carries substances from the mother to the foetus?
Umbilical Vein
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What substances does it carry?
Oxygen, glucose and amino acids/nutrients
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Why do the mother and foetus' blood never mix?
They may have different blood groups which would clump the cells together
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What process causes sex hormones to be released?
Puberty
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What is the male sex hormone called?
Testosterone
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What effects does it have?
Voice deepens, growth of penis and muscular body
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What is the female sex hormone called?
Oestrogen
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What effects does it have?
Menstruation, growth if breasts and widening of hips/pelvis
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What are the three types of contraception?
Mechanical, Chemical and Surgical
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Name the mechanical contraceptive.
Condom
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Name the 2 chemical contraceptives.
1. Contraceptive pill 2. Implant
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Name the 2 surgical contraceptives.
1. Vesectomy (male) 2. Sterilisation (female)
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What are some causes of infertility in females?
No/few eggs, acidic vagina, no lining, blocked oviducts and STI
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What are some causes of infertility in males?
Impotence, low sperm count and unhealthy sperm
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What are 2 treatments for infertility?
1. Hormone stimulation injections and IVF
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What does IVF stand for?
InVirtroFertilisation
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What are the 4 steps of IVF?
1. Ovarian Stimulation 2. Egg recovery 3. Fertilisation 4. Embryo transfer
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What are the ethical problems of IVF?
Older parents can conceive, sperm of dead fathers can be used, 'designer babies'
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What is the perpose of the menstrual cycle?
To prepare the female system for pregnancy
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What happens on day 1-5?
Menstruation, blood flows as the lining of the uterus breaks up
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What happens day 6-10?
The uterus lining starts to grow again
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What happens day 11-17?
Sperm in oviducts likely cause fertilisation
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What happens day 13-15?
Ovulation, egg is set free from ovary
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What happens day 18-28?
Non- fertilised egg dies and passes out of the vagina
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Other cards in this set

Card 2

Front

What is the male gamete?

Back

Sperm

Card 3

Front

How many chromosones do they each contain?

Back

Preview of the front of card 3

Card 4

Front

What is fertilisation?

Back

Preview of the front of card 4

Card 5

Front

What type of cell do they form?

Back

Preview of the front of card 5
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