Transcript Aerobic Respiration

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Aerobic Respiration
Noadswood Science, 2012
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Aerobic Respiration
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Saturday, April 9, 2016
To know the equation for aerobic respiration and how the energy
produced is used
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Respiration
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What do you know about respiration?
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What is needed to live?
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Do all organisms require the same thing?
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In pairs, discuss any facts you know in the next two minutes
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Respiration
“Respiration is breathing in and out”
“Plants photosynthesise but animals respire”
“During respiration, oxygen is produced”
“During respiration, energy is produced”
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Although these comments may sound correct, every single
one is wrong!!!
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Respiration
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Respiration is not the same thing as breathing (ventilation)
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Respiration is a chemical process in which energy is released
from food substances, such as glucose (sugar)
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Aerobic respiration needs oxygen to work – most of the
chemical reactions involved in the process happen in
specialised cell organelles – the mitochondria
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Respiration
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Respiration takes place in the cells (it is not “breathing in and
out”)
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Respiration is the release of energy (from glucose) in our
cells
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Animals and plants respire
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Respiration Equation
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Aerobic Respiration: glucose + oxygen  carbon dioxide + water + (energy)
C6H12O6 + 6O2  6CO2 + 6H2O + (energy)
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Aerobic Equation
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Respiration Use
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Respiration is used by both animals and plants…
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The energy released is used to:  Build up smaller molecules into larger ones, as well as:  Enabling muscles to contract
 To build up tissue
 Maintaining a constant body temperature
 In plants to build up sugars, nitrates and other nutrients
 To build up amino acids (and eventually proteins)
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Testing
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How could you test for respiration? What could you measure to
prove it was taking place and at what rate?
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During respiration the gas carbon dioxide is produced - testing
for this would show if respiration occurred, and at what rate
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The test for carbon dioxide is to use limewater (it goes cloudy)
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Water is also produced - we could measure this (how much we
exhale)
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Energy is also released during respiration = which is used by
our cells (however it is difficult to test this, but you could monitor
the activity of the organism (the heat released))
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Key Words
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Have a go at the following wordsearch: Words to find: Aerobic
Anaerobic
Carbohydrase
Carbohydrate
Carbon dioxide
Energy
Glucose
Lactic acid
Oxygen
Respiration
Water
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Test
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Test