Everything you need to know for the first biology exam!

Hey, so I put together a slide show to help me with the Biology '1a and 1b' exam and thought that I would share it wwith you! It is helpful and it's for the new AQA specification which there isn't much help on anymore! It goes through the CGP revision guide but easier and more colourful!

Hope it helps


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Biology (B1)
Sarah Slingsby…read more

Slide 2

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Diet and Metabolic Rate
There are 7 food groups-
O Water
O Carbohydrates: release energy
O Fats: to keep warm and release energy
O Protein: for growth, cell repair and replacement
O Fibre: to help the digestive system
O Vitamins and minerals: general health
Metabolic rate depends on who you are (exercise,
gender etc.) and is the speed that the chemical
reactions which keep us alive occur!…read more

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Factors affecting health
O Unbalanced diet: eating too much or too little can
mess with the way your body should work which
can make you ill.
O Not enough exercise: exercise increases the
amount of energy you use which decreases the
amount stored by fat, it builds muscle and can
increase metabolic rate
O Inherited factors: depending on genetics, some
medical issues can be inherited…read more

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Fighting Disease
Our bodies are SUPER clever, like seriously!
The `Bad Guys'
-Bacteria (very small living cells)
O They reproduce very quickly and make you ill by
damaging your cells and produce toxins
-Viruses (not cells, they're tiny tiny tiny)
O They invade your cells and use the cells machinery
to replicate themselves, the cell bursts releasing
the viruses and making you feel ill.…read more

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Fighting Disease
To protect ourselves we have white blood cells
which are the `Superheroes' in regards to
1) They can consume them
2) Produce antibodies
3) Produce antitoxins…read more

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Fighting disease...
O Some drugs relieve symptoms (aspirin), others cure
O Bacteria can become resistant though to antibiotics
by mutating so they aren't killed by the antibiotic.
The resistant strands will survive and reproduce so
the number will increase, making the infection very
seriosus (MRSA)
O You can investigate antibiotics by growing
microorganisms in the lab.
O Semmelweis cut deaths from birth by making people
clean their hands in an antiseptic solution.
O Antibiotic resistance is becoming more common due
to an overuse of antibiotics…read more

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