GCSE Biology B1
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What's the difference between "fit" and "healthy"? Can you be one without the other? | show 🗑
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What is "areobic respiration"? | show 🗑
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show | Glucose + Oxygen = Carbon Dioxide + Water (+ Water)
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show | C6H12O6 + 6O2 = 6CO2 + 6H2O (+ energy)
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show | After vigorous exercise, your muscles are still short of oxygen. You also need the extra oxygen to break down the lactic acid in the muscles. The less fit you are, the higher the oxygen debt.
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Name 6 nutrients the body needs and what they are needed for. | show 🗑
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show | This is where someone is 20% (or more) over the recommended body weight.
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Name 3 disorders/diseases that obese people are more likely to get. | show 🗑
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show | Anorexia or Bulimia.
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Name three types of digestive enzyme and say what they do. | show 🗑
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How does bile help digestion? | show 🗑
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show | Fungi - can cause atheletes foot. Bacteria - can cause cholera. Viruses - Flu is caused by a virus. Protozoa - dysentry is caused by protozoa.
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Explain how the immune system deals with pathogens. | show 🗑
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Explain how immunisation stops you from getting infections. | show 🗑
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show | Benign is where the tumour grows until there is no more room, these cells stay where they are and is the least dangerous of the two. Malignant is where the tumour can spread to other sites in the body. This is the most dangerous of the two.
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What is a double blind clinical trial? | show 🗑
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show | Prescription - you can buy them over the counter at a chemists. Addiction - they have a physical need for the drug. Tolerence - the body gets used to the drug. Rehabilitation - this a place to get help and support to overcome a drug addiction.
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How does a stimulant drug work? | show 🗑
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How does a depressant drug work? | show 🗑
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show | These reduce the number of "painful" stimuli at the nerve endings near an injury.
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show | They help build muscle and allow the athelete to train harder.
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show | They distort what is seen and heard by altering the pathways nerve impulses normally travel along.
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Describe four different illnesses smoking can cause. | show 🗑
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Describe the path of light when travelling into the eye. | show 🗑
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show | These stop you from hurting yourself.
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Explain how negative feedback helps to maintain a constant internal environment. | show 🗑
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Describe how body temperature is reduced when you get too hot. | show 🗑
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Explain how insulin controls blood sugar levels. | show 🗑
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show | Type one is where the pancreas cannot produce insulin. This can be controlled by avoiding foods that are rich in simple carbohydrates. It is also helpful if they exercise after they have eaten. Another way is by injecting insulin into themselves.
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show | Extra hair on their face and body, muscles develop, penis and testicles enlarge, sperm production and deepening of the voice.
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show | This is taken by women who aren't releasing eggs to stimualte egg development in their ovaries. FSH stimulates the ovaries to produce oestrogen which stimulates the release of an egg.
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Describe the structure of DNA. What are genes? | show 🗑
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show | The order of the bases in a gene controls the order of amino acids in a protein.
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show | Gamete formation - making sperm cells and egg cells, then fertilisation - the gametes join together. Mutations - changes in the genetic codes.
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Name three things that can cause genetic mutations. | show 🗑
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show | An allele is a different version of the same gene.
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Which chromosome determines your gender? | show 🗑
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