Biology- B1.1

It is the B1.1 topic which is Keeping Healthy. 

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Name the components of a balanced diet ?
Carbohydrates, Proteins, Fats, Vitamins, Minerals, Fibre and Water
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Why does your body need Carbohydrates?
To give your body required energy
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Why does your body need fats?
To provide insulation and as an energy store
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Why does your body need protein?
For growth and repair
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Why does your body need vitamins and minerals ?
To enable your body to work healthily and prevent deficiency disease.
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Name two side effects of over eating ?
Type 2 diabetes/ high cholesterol/ high blood pressure/ over weight/ arthritis
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Describe how daily exercise help a person to lose mass?
Increases metabolic rate/ gives more energy/ energy comes from the food/ less energy gets converted to fat
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What is metabolic rate ?
The rate at which chemical reaction happen in our cells.
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Why do men have a higher metabolic rate ?
Men have a higher proportion of muscle to fat than women
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Describe two factors that affect metabolic rate?
Amount of physical activity/ the proportion to muscle to fat in our body
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Give two inherited factors that can effect our health?
metabolic rate/ cholesterol level
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When does a person become overweight?
When the energy content of the food is more than the energy used in daily life.
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4 health problems linked to obesity?
Arthritis/ type 2 diabetes/ high blood pressure/ heart disease
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State two ways a person can lose mass ?
Reduce the amount of energy by reducing the amount of intake/ increase the amount of exercise thus using up more energy.
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how does exercise make a person healthier?
increase the amount of energy used up by the body/ increase the muscle proportion to the fat proportion
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Define malnourished?
Lack of a balanced diet
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Why do you need cholesterol in your body?
To form our cell membranes/ to make important hormones
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What are the risks of eating a diet rich in fat?
high cholesterol levels/ increased risk of heart disease.
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What are pathogens?
organisms that cause disease
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Name two pathogens ?
virus/ bacteria
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How do virus cause illness?
viruses enter the body cells and damages the cells
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How do bacteria cause illness
by producing toxins and damages the cell
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Give two reasons why pathogens make us feel ill?
Pathogens produce toxins/ they damage the cell
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How do WHITE BLOOD CELLS protect us against pathogens?
Produce antibodies/ produces anti toxins/ engulfs pathogens.
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What is an antibody?
These are the substances made by white blood cells to kill pathogens
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What is a pandemic ?
A disease affecting people in many countries.
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What is an antibiotic?
A medicine used to get rid of bacteria
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Why will antibiotic not get rid of the flu?
They only kill bacteria
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What medicine will relieve symptoms of flu?
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One reason why antibiotics should not be overused ?
might speed up the development of resistant strains of bacteria
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Describe how the antibiotic-resistant strains of bacteria develop?
There exists a variation in the bacteria population. Most bacteria are killed by antibiotics by some survive. Breed and produce more resistant bacteria.
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Why are MRSA strains so difficult to treat?
MRSA strains are resistant to antibiotics
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What is a vaccine ?
Vaccine contains the dead/ inactive form of the pathogen.
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How does a vaccination make a person immune to a disease
The inactive pathogen is injected into the body. It stimulates the white blood cells to produce antibodies. the pathogen is killed by the antibodies. If a person is later infected than they have the pathogens to kill the disease quickly.
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One advantage of vaccinated a larger proportion of the population against a disease?
In reduces the spread of infection
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What does the MMR vaccine protect people against?
Measles/ Mumps/ Rubella
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Describe the aseptic techniques used to grow micro-organisms?
Sterilise petri dish that is used to grow micro-organisms. Nutrient agar that provides food must be sterilised. Inoculate the agar with the micro-organisms you want to grow. Seal the petri dish and incubate at 25 degrees.
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Other cards in this set

Card 2


Why does your body need Carbohydrates?


To give your body required energy

Card 3


Why does your body need fats?


Preview of the front of card 3

Card 4


Why does your body need protein?


Preview of the front of card 4

Card 5


Why does your body need vitamins and minerals ?


Preview of the front of card 5
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