Biology Key words

Question	Answer
Depressant	slows down brain activity for example alcohol, solvents, temazepam
hallucinogen	alters what we see and hear for example LSD
painkiller	blocks nerve impulses for example aspirin, paracetamol
performance enhancer	improves muscle development for example anabolic steroids
stimulant	increases brain activity for example nicotine, caffeine, ecstasy
Nicotine	Nicotine is the addictive substance in tobacco
Carbon Manoxide	Carbon monoxide combines with the haemoglobin in red blood cells and so reduces the ability of the blood to carry oxygen. This puts extra strain on the circulatory system, and can cause an increased risk of heart disease and strokes.
Alcohol Effects	Long term liver damage short term slurred speech
Positive phototropism	Growth towards light To get maximum light for photosynthesis
Negative phototropism	Growth away from light Less chance of drying out
Positive geotropism	Towards gravity More chance of finding moisture
Negative geotropism	Away from gravity More chance of finding light
Carbohydrates	Made from - simple sugars such as glucose Main Use - high-energy source
Fats	Made from - fatty acids and glycerol Main Use - high-energy source
Proteins	Made from - amino acids Main Uses - growth and repair
Food Chain	Planton -> Fish -> Seal -> Polar bear Arrows show the flow on energy
BMI	Body Mass Index BMI = mass in kg ÷ (height in m)²
Enzyme reaction catalysed	amylase=starch → sugars protease=proteins → amino acids lipase=lipids → fatty acids + glycerol

Resource summary

	Created by Matt Peters 98 about 10 years ago