Biology

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what is a mutation?
a change in a gene
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what is your metabolic rate?
the rate at which all chemical reactions take place in the cells in your body
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what are the 7 main food groups you need to have a healthy diet?
carbohydrates, proteins, fats, minerals, vitamins, fibre and water
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why does an older person need less energy than a younger person?
Because a younger person uses up more energy than an older person
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what problems can starvation cause?
Anorexia, Vervosa
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What problems can obesity cause?
Artritis, Diabetes, High Blood Pressure and Heart Disease
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how do you work out your BMI?
BMI = Weight / (Height)²
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what does it mean to have malnutrition?
it means you either have too little or too many nutrients in your body
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what are the advantages of fertility treatment?
1. Helps you have a baby 2. its safe
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what are the disadvantages of fertility treatment?
1. Expensive 2. Isn't always successful
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what are the advantages of the contraceptive pill?
1. helps control population growth 2. there is less poverty 3. helps people if they don't want to have a baby
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what are the disadvantages of the contraceptive pill?
1. it has health risks for the mother 2. expensive for society 3. raises ethical issues (some religious groups think that its denying life)
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what are the three neurons called in the reflex arc?
1. Sensory Neurone 2. Relay Neurone 3. Motor Neurone
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what receptor organ controls the eye?
light receptor
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what happens at the synapse when the impulse arrives at the next neurone?
it produces an electrical impulse.
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where are LH and FSH secreated?
in the pituitary gland
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where is oestrogen secreated?
in the ovaries
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what is the job of LH?
LH stimulates the release of the matured egg form one of the ovaries in the middle of the menstrual cycle
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What is the job of Oestrogen?
Oestrogen stimulates the lining of the womb. also stimulates the pituitary gland to product LH.
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What is the job of FSH?
FSH stimulates the maturing of the egg in the ovaries and also stimulates the ovaries to produce oestrogen.
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Where is the pituitary gland?
in the brain
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What is homeostatis?
The result of the co-ordination of your nervous system, your hormones and your body organs
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How long approximately is the menstrual cycle?
approx. 28 days
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What do impulses travel along?
neurones
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How do hormones travel around your body?
by blood
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What are hormones?
Hormones are chemicals created by glands that control the processes in your body.
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Card 2

Front

what is your metabolic rate?

Back

the rate at which all chemical reactions take place in the cells in your body

Card 3

Front

what are the 7 main food groups you need to have a healthy diet?

Back

Preview of the front of card 3

Card 4

Front

why does an older person need less energy than a younger person?

Back

Preview of the front of card 4

Card 5

Front

what problems can starvation cause?

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Preview of the front of card 5
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