B1 Revision cards

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what does it mean when a person becomes malnourished?
They are getting too much or not enough of the nutrients we need to survive.
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When does a person lose mass?
A person loses mass when the energy content of the food taken in is less than the amount of energy expended by the body. Exercise increases the amount of energy expended by the body.
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what is metabolic rate?
The rate of which chemical reactions take place in the body.
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what is a drug?
A drug is a substance that alters body chemistry
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What is a disadvantage of prescribing aspirin?
It can increase the chance of developing ulcers in the stomach
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What is a disadvantage of taking statins?
Statins may cause liver and muscle damage.
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what factors can affect metabolic rate?
Gender, muscle to fat ratio, genes, the amount of exercise you do.
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What is the name for Microorganisms that cause disease?
Pathogens
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How do bacteria and viruses make us ill
bacteria release toxins that are posionous. viruses live inside the host cell and reproduce. This makes the cell become damaged.
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Name Barriers that prevent pathogens from making us ill.
skin, mucus, hydrochloric acid in the stomach
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How do White blood cells defend against pathogens?
They release anti bodies which destroy particular bacteria or viruses, they release antitoxins which neutralize the toxins produced by bacteria, the ingest the pathogen
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How does the body respond to a stimulus?
Stimuli detected, by the receptor. An electric impulse is then sent along the sensory neurone to the synapse which is in the central nervous system. At the synapse, chemicals are released that diffuse across the gap and an electric impulse is then se
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Explain the carbon cycle in terms of plants and animals.
Green plants used the carbon dioxide in the atmosphere for photosynthesis the pants store this as nutrients e.g C, P, F. This is released back into the atmosphere when the respire. When animals eat the plants the carbon compound are transferred into
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Explain the carbon cycle in terms of decay.
When animals and plants die the waste materials contain carbon compounds this decomposed and decayed by micro- organisms . micro- organisms respire and the carbon dioxide is released
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Explain the carbon cycle in terms of waste
waste of animals and plants contain carbon compounds this is decomposed by microorganisms that release the carbon dioxide when the respire.
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Explain the carbon cycle in terms of Fossil fuels
the matter of dead plants and animals form fossil fuels over millions of years. The carbon is released back into the atmosphere through combustion
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what is a reflex action?
a quick automatic response that occurs without having to think about it.
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what happens in a reflex action?
receptor detects a stimulus - change in the environment............. Sensory neurone sends signal to relay neurone ......Motor neuron sends signal to effector.... Effector produces a response
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Describe the process of immunization
an inactive form of the pathogen in injected into the body. so that in the event of infection the antibodies will be able to quickly produce the right antibodies.
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What do pain killers do?
They relieve the symptoms of disease.
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advantages and disadvantages of using statins
statins< +reduce cholesterol more than Cholesterol blockers +good for people with inhierited high cholesterol -can damage organs -take them for the rest of life
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Other cards in this set

Card 2

Front

When does a person lose mass?

Back

A person loses mass when the energy content of the food taken in is less than the amount of energy expended by the body. Exercise increases the amount of energy expended by the body.

Card 3

Front

what is metabolic rate?

Back

Preview of the front of card 3

Card 4

Front

what is a drug?

Back

Preview of the front of card 4

Card 5

Front

What is a disadvantage of prescribing aspirin?

Back

Preview of the front of card 5
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This is a useful set of revision cards designed to help learn the key terms in the AQA B1 unit.  Learning definitions of the key terms in each unit is aways a helpful revision exercise as these are often the basis for one or two mark questions.

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