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B2 Edexcel 2007…read more

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Anaerobic Glucose Energy + Lactic Acid
Protein Synthesis(HT)
Quick Available
Triplet code = amino acid
No Oxygen
4 amino acids =protein
Lactic Acid
mRNA out of nucleus
Small Energy Monitoring done by digital
thermometers /computers Ribosomes
Oxygen Debt DNA
More reliable and by kept on polypeptide
Double Helix Gene
4bases Section of DNA
Gases Diffuse across membranes
Respiration Genetic
Nucleus Engineering
C6H12O6 + O2 CO2+H2O Chromosomes
Aerobic 23 pairs Microbes
Restriction enzymes
Food Production
Fermentation Advantages
Obesity Reprodce quickly
Made indoors
Use waste products of industrial waste
4 times of 20mins
75% increase in HR
Balanced diet Controlled
environment which
provide ideal
Always Changing due to lifestyles changing, understand the
Human body and research Health Claimsabout different
foods…read more

Slide 3

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RESPIRATION; the process of breaking down glucose to release energy, and it goes on in
every cell in the body. The energy is used for things like; building up larger molecules (like
proteins), contracting muscles and maintain a steady body temperature. It also happens in
plants ­ all living things respire, its how they get energy from their food
· The circulatory system carriers glucose, oxygen and CO around the body in the blood
· The glucose needed for respiration comes from breaking down food in the digestive system
· The oxygen comes from air breathed into the lungs. CO is breathed out.
· The smallest blood vessels in the body are the capillaries. All the cells in the body have
capillaries nearby to supply them with glucose and oxygen, and take away the Carbon Dioxide.
These substances move between cells and the capillaries via a process called diffusion
· Veins ­ carry blood back to heart
· Arteries ­ carry blood away from heart
Video on Respiration
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Diffusion is the movement of particles from an area of higher
concentration to an area of lower concentration
When cells respire they use up oxygen and glucose, so the
concentration of these inside the cells is low. The
concentration of these substances in the blood is higher, so
they diffuse from the capillaries into the cells.
When cells respire they produce lots of Carbon Dioxide, so
the concentration of this in the cells is high. This means CO
diffuses from the cells into the blood, where the concentration
is lower
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Slide 5

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Aerobic Respiration;
Using oxygen. Its the most efficient way to release energy from glucose.
Equation;; GO WEC
Glucose + Oxygen = Carbon Dioxide + Water + Energy
C6H12O6 + O = CO + HO + Energy
Anaerobic Respiration;
Happens when there's not enough Oxygen ­ it does not release as much energy as
aerobic. Equation;;
Glucose = Lactic Acid + Energy
You can't use it for long;
- it produces a build-up of lactic acid in the muscles which gets painful and can give
you cramp
- After anaerobic respiration, when you stop exercising you will have oxygen debt
which needs to be repayed, therefore you have to keep breathing hard for a while
after you stop to get oxygen into your muscles to convert lactic acid to harmless
CO and water.
- But an advantage is you can use your muscles for a while longer…read more

Slide 6

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When you exercise you respire more;
· Muscles need energy from respiration to contract. When you exercise some of
your muscles contract more frequently than normal so you need more energy.
This energy comes from increased respiration ­ so you need to get more oxygen
into the cells
· Your breathing rate increases to get more oxygen into the blood. To get his
oxygenated blood around the body faster your heart rate increases. This removes
CO more quickly at the same time.
· The rate at which oxygen diffuses from the blood into the cells increases during
exercise. This is because diffusion is quicker when the concentration difference is
larger. The cell has very low O as its using it up really quickly. CO diffuses out of
the cell quicker too because there is loads being produced in the cell
· Diffusion of O and CO also increases at the lung surface because of bigger
concentration differences and because the surface area for diffusion increases
(the lungs expand more when you exercise)
· When you do really vigorous exercise like sprinting your body can't supply enough
oxygen to your muscles quickly enough so they start respiring anaerobically…read more

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