# B7 Revision Notes - EVERYTHING YOU SHOULD NEED!

I've written down everything in a handy guide for B7 OCR GCSE Biology (Triple Award). Everything you should need should be in here, however except from the article, which your school should go through with you.

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• Created by: Luke
• Created on: 04-06-12 21:32

First 189 words of the document:

B7 Revision ­ The key points
Important equations to remember:
Aerobic Respiration Glucose + Oxygen = Water + Energy (High)
Anaerobic Respiration Glucose = Lactic Acid + Energy (Low)
Photosynthesis Carbon Dioxide + Water = Oxygen + Glucose
Photosynthesis (symbol) 6CO2 + 6H2O = 6O2 + C6H12O6
An important formula to remember:
Energy available to next level
% Efficiency = Energy
that was available before x 100
Respiration:
There are two types of respiration: aerobic and anaerobic. The former
takes place takes place all the time in every single cell, releases high
amounts of energy, and is used when there is a lot of oxygen available.
The latter takes place rarely, and is only used when there is little
oxygen. It also releases only a little energy. The lactic acid produced in
anaerobic respiration causes cramps, and can only be ridden of with
more oxygen, which explains why one breathes more when doing
strenuous exercise.
ATP is a small molecule that transports energy that is released during
respiration to wherever it is needed, and is produced during
respiration.

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Blood:
There are 4 blood types and can be explained in the following table:
AB A B O
Antibodies None (Clots) (Clots) (Clots)
Anti-B Anti-A Anti-A, B,
and AB
Antigens AB A B None
Receives AB, A, B, O A, O Blood B, O Blood O Blood
Blood
Blood contains 4 main parts: red blood cells (no nucleus, carry oxygen,
make blood red), white blood cells (fight off foreign cells and
infections), platelets (help blood coagulate or clot), and plasma (the

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Biceps are a perfect example:
Therapies:
To check whether a treatment is working, they will ask a number of
questions, as follow: Do they have any side-effects from the current
scheme? Are they on any other medication? Do they have any family
health problems? Have they had any previous health
treatments/medications? What level of exercise do they do? What
kind of lifestyle do they live?
Health practitioners make sure the medication is working and checks
for side effects, while fitness practitioners encourage the patient,

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Types of common injuries that you should know:
Sprain ­ Damage to a ligament
Dislocation ­ Bones being pulled out of sockets
Torn ligaments ­ A ligament is ripped literally
Torn tendons ­ a muscle contracts in one way but pulls in the other,
causing a tear in the tendons
You should know the method of treating a sprain:
Rest
Ice (reduces swelling and blood flowing to the area)
Compression (stops swelling and prevents movement to aggravate)
Elevate (lowers blood flow so less swelling)

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You will be expected to know how to work out the
percentage efficiency, which is covered on page 1. You will also be
expected to know how to produce a pyramid of biomass from a food
chain, as well as a chain from a vast food chain. A pyramid of biomass is
just like a normal triangle with a large base and small tip with the
producer at the beginning (like a tree) and the predator at the top

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Remember that food chains tend to only be 4 trophic levels long
because energy is lost. You will need to know how: excretion,
movement, respiration, uneaten parts, and heat energy.
Soil:
Soil is made up of inorganic material (rocks and things that aren't alive
leaving, as well as waste products like faeces and compost).
Symbiosis:
Symbiosis is when two organisms benefit each other.…read more

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Natural selection has caused
sickle-cell anaemia to become more frequent in malaria-plagued areas
because it enables the chance of survival to become increased.
In addition to this, you should know how to complete the following
table (Y is the normal allele, y is the recessive sickle-cell allele):
Y y
Y YY Yy
y Yy yy
A person with YY is free from it.
A person with Yy is a carrier but experiences no symptoms.
A person with yy is a sufferer from it.…read more

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Photosynthesis:
The final part you need to know (except from the ideas in context
article)!
Photosynthesis is affected by the amount of light, carbon dioxide, and
temperature. It takes place only during the day because of the
sunlight, but plants still respire during the night.…read more