Human Reproduction - menstural cycle + pregnancy

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  • Created by: Isobelfj
  • Created on: 02-04-18 17:54
How long does the menstrual cycle last?
28 days
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What is the Menstrual Cycle?
The Menstrual Cycle involves the body preparing the uterus ( womb ) in case it receives a fertilised ovum ( egg ) which makes the lining ready.When there is no ovum the uterus lining is lost through woman's body
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What are the FOUR hormones that control the cycle?
1) FSH = Follicle-Stimulating Hormone 2) Oestrogen 3) LH= Luteinising Hormone 4) Progesterone
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Where is FSH produced?
Pituitary Gland
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Where is Oestrogen Produced?
Ovaries
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Where is LH produced?
Pituitary Gland
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Where is Progesterone produced?
ovaries, by the remains of the follicle after ovulation
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What is the role of Oestrogen in the cycle?
Causes lining of the uterus to grow + Stimulates the release of LH ( which causes the release of an egg )
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What is the role of Progesterone in the cycle?
Maintains the lining of the uterus during the second half of the cycle. When the level of progesterone falls , the lining breaks down. Also inhibits the release of LH and FSH
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What is the role of the placenta in the nutrition of the developing embryo?
The placenta lets the blood of the embryo and mother get very close to each other to allow the exchange of food, oxygen + waste products
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What is the role of Oestrogen in the development of secondary sexual characteristics?
Oestrogen in woman causes 1) extra hair on the underarms and pubic area 2) hips widen 3)Development of breasts 4) Ovum release start of periods
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What is the role of Testosterone in the development of secondary sexual characteristics ?
Testosterone in men causes 1) Extra hair on face + body 2) Muscles to develop 3) Penis + Testicles enlarge 4) Sperm production 5) Voice deepens
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How does Amniotic Fluid protect the developing fetus?
The amnion membrane forms- this surrounds the embryo and is full of amniotic fluid. Amniotic fluids protects the baby against knocks + bumps
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What hormone maintains the lining of the uterus ?
Progesterone
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Which hormone causes LH to be released ?
Oestrogen
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What hormone causes the development of the remains of the follicle into a corpus lutem ?
LH
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Which hormone when at a low level causes the uterus lining to break down?
Progesterone
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What hormone stimulates the production of oestrogen ?
FSH
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What hormone causes follicles to mature?
FSH
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What hormone inhibits the production of LH + FSH?
Progesterone
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What hormone causes the release of an egg when the follicle ruptures ?
LH
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What hormone causes the uterus lining to get thick + grow ?
Oestrogen
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Other cards in this set

Card 2

Front

What is the Menstrual Cycle?

Back

The Menstrual Cycle involves the body preparing the uterus ( womb ) in case it receives a fertilised ovum ( egg ) which makes the lining ready.When there is no ovum the uterus lining is lost through woman's body

Card 3

Front

What are the FOUR hormones that control the cycle?

Back

Preview of the front of card 3

Card 4

Front

Where is FSH produced?

Back

Preview of the front of card 4

Card 5

Front

Where is Oestrogen Produced?

Back

Preview of the front of card 5
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