B1
- Created by: Georgia Chater
- Created on: 09-12-12 21:02
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- BIOLOGY 1
- KEEPING HEALTHY
- Metabolic rate: speed chemical reactions take place in body
- To lose mass, use more energy
- Eat less, exercise more
- High blood cholesterol leads to heart disease.
- Creating build up of plaques, causing blocked arteries
- Antibiotics kill most bacteria
- White blood cells kill pathogens
- via phagocytosis, antibodies and antitoxins
- Vaccination encourages WBC to create antibodies
- Meaning the person is immune
- NERVES, HORMONES & DRUGS
- Sensory neurones carry electrical impulses to the CNS to receptors
- Motor neurones carry impulses from CNS to effectors
- muscles and glands
- Conditions in cells MUST be kept constant
- Including: Water,sugar and salt concentration
- Sweating is one way to reduce temperature
- Auxins causes plant shoots to grow towards the light and plant roots to grow towards gravity
- Positive phototropism
- Positive gravitropism
- Menstrual cycle
- FSH: Matures the egg and causes ovary to secrete oestrogen
- Oestrogen: causes uterus to thicken and stops production of FSH
- LH: causes ovulation
- Interdependence & Adaptations
- Adaptations: characteristics that enable them to live in their enviroment
- The better the adaptation more likely the organism will win the competition
- Decay by micro-organisms is an important way to recycle nutrients
- Carbon cycle shows how the carbon moves around the atmosphere
- Energy is lost at each stage in a food chain
- results in less biomass
- this can be shown in a pyramid of biomass
- Pollution levels can be measured by: Temp & pH
- Or by studying distribution of living pollution indicators
- Lichens can be used to show air pollution
- Invertebrates to show water pollution
- Or by studying distribution of living pollution indicators
- Adaptations: characteristics that enable them to live in their enviroment
- Genes & Evolution
- Organisms vary because genes they inheritance
- Asexual reproduction results in clones.
- taking cuttings (tissue culture) embryo transplants adult cell cloning
- Sexual reproduction offspring are different from their parents
- Darwin's ideas about evolution explain how things evolved due to variation and survival
- Genetic engineering:take a gene from one organism and put it into another one
- Used to make insulin from bacteria and create GM crops
- KEEPING HEALTHY
- KEEPING HEALTHY
- Metabolic rate: speed chemical reactions take place in body
- To lose mass, use more energy
- Eat less, exercise more
- High blood cholesterol leads to heart disease.
- Creating build up of plaques, causing blocked arteries
- Antibiotics kill most bacteria
- White blood cells kill pathogens
- via phagocytosis, antibodies and antitoxins
- Vaccination encourages WBC to create antibodies
- Meaning the person is immune
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