Respiration
L/O ;- To know the equation for
respiration
What does this phrase say?
• (Beryllium – Boron) / Nitrogen / (Zinc – Nitrogen) / Yttrium /
(Manganese – Nitrogen) / (Beryllium – Boron) / Sulphur
• (Cadmium – Carbon) / Iodine / Germanium / Sulphur /
(Titanium – iodine)
• Yttrium / Oxygen / (Copper – Carbon) / (Krypton –
Potassium)
• Fluorine / Oxygen / Oxygen / Cadmium – Carbon
• Samarium / Aluminium / (Lithium – Iodine) / Erbium
• (Maganese – Nitrogen) / Oxygen / (Lithium – Iodine) /
(Beryllium – Boron) / Carbon / (Copper – Carbon) / (Lithium –
Iodine) / (Beryllium – Boron) / Sulphur
• Sulphur / Oxygen
• (Titanium – Iodine) / Helium / Yttrium
• Carbon / (Sodium – Nitrogen) / Nitrogen
• Beryllium
• (Sodium – Nitrogen) / Boron / Sulphur / Oxygen / (Krypton –
Potassium) / Beryllium / (Cadmium – Carbon)
Respiration
• What do you know about respiration?
• What is needed to live?
• Do all organisms require the same thing?
• In pairs, discuss any facts you know in the
next two minutes
Respiration
“Respiration is breathing in and out”
“Plants photosynthesise but animals respire”
“During respiration, oxygen is produced”
“During respiration, energy is produced”
• Although these comments may sound correct, every
single one is wrong
• These are common misconceptions, ‘banana skins’ of
the SATs
Respiration
• Respiration takes place in the cells (it is not “breathing in
and out”)
• Respiration is the release of energy (from glucose) in our
cells
• Animals and plants respire
• In the light plants respire, but produce the oxygen for this
to occur by photosynthesis - the carbon dioxide they
produce via respiration is used for photosynthesis
• In the dark plants respire, producing carbon dioxide
Equation
• Remember, in a reaction: reactants  products
glucose + oxygen  carbon dioxide + water + (energy)
C6H12O6 + 6O2  6CO2 + 6H2O + (energy)
• Respiration is the process of converting glucose to
energy, occurring in every cell
How could you test for respiration?
HINT – a reaction is usually tested for
by measuring how quickly the
reactants are used up or how quickly
the products are produced
• During respiration the gas carbon dioxide is produced testing for this would show if respiration occurred, and at
what rate
- The test for carbon dioxide is to use limewater (it goes
cloudy)
• Water is also produced
• Energy is also released during respiration. This may be in the
form of heat
So how would you test if these dead
cells respire?
• You could measure the heat of both the live and dead
cultures, and see if carbon dioxide is produced (look
for the limewater going cloudy / see if any carbon
dioxide bubbles are released)
What did you find
out?