biology

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what are the four stages of the menstrual cycle?
stage 1: the bleeding starts, uterus lining breaks down. stage 2: lining builds up again. 3: egg is developed and released. 4: wall is maintained.
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What does FSH do?
causes egg to mature in ovaries. stimulates ovaries to produce oestrogen.
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what does oestrogen do?
causes pituitary gland to produce LH.
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What does LH do?
stimulates release of the egg.
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the pros of the pill?
99% effective, reduces risk of getting some types of cancer.
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cons of the pill?
isnt 100% effective. has side effects.
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What is an Auxin? and what does it control?
A plant growth hormone. the response to light gravity,
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what direction does the shoots of a plant grow?
Towards light. away from gravity.
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What direction does the roots of a plant grow?
towards gravity, towards moisture.
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What bodily levels do we have to control?
Ion content. sugar content. water content. temperature.
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where is the ion content regulated? and how are they lost?
Kidneys. in your sweat.
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How do we lose water?
through the skin from sweat, via lungs in breath. via kidneys in urine.W
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What are medicinal drugs?
prescripted, medical use eg. antibiotics.
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what are recreational drugs?
used for fun, can be legal or illegal. eg cannabis.
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what are performance enhancing drugs?
improve an persons performance. eg steroids.
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How do scientists test medical drugs?
in human cells and tissues. live animals. human volunteers.
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how many human nucleus cells contain?
23 pairs of chromosomes.
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what do chromosomes carry?
genes
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what is the scientific word for sperm and egg?
gamete
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What is asexual reproduction?
one parent. one ordinary cell dividing into two, having the same genetic information as the parent cell.
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How do you clone a plant?
Cut off a leaf or stem, plant it.
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how do you clone an animal?
using embryo transplants. sperm cells taken from dad and egg cells from mum, the embryo developed is then split.
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how do you clone using adult cells?
one egg cell. one adult cell. removing the nucleus from the egg cell and the adult cell, electric shock into an embryo and then put into the mother. live animal.
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what does genetic engineering use?
enzymes to cut and paste genes
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what are the pros of a gm crop?
increase the yield. no problems growing.
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what are the cons of a gm crop?
affects the number of weeds. allergies, transplanted genes. "super weed"
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what is the theory of evolution?
More than 3 billion years ago, life on earth began as simple organisms from which all the more complex organisms evolved.
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Card 2

Front

What does FSH do?

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causes egg to mature in ovaries. stimulates ovaries to produce oestrogen.

Card 3

Front

what does oestrogen do?

Back

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Card 4

Front

What does LH do?

Back

Preview of the front of card 4

Card 5

Front

the pros of the pill?

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Preview of the front of card 5
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