Respiration Flashcards
What kind of reaction is aerobic respiration?
exothermic
Word equation of aerobic respiration
glucose + oxygen → carbon dioxide + water
C6H12O6 + 6O2 → 6CO2 + 6H2O
Where does aerobic respiration take place
Mitochondria of your cells
Why do we need respiration?
Living cells need energy = build up large molecules from smaller ones to make new cell material
Muscles contract
Plants = energy from respiration is transferred to move mineral ions form soil into root hair cells
How to determine the rate of anaerobic respiration
Collect gas produced using measuring cylinder/delivery tube/gas syringe
Compare volumes at different temperatures
Incubate mixture and different temperatures
Anaerobic respiration word equation
glucose → lactic acid
Anaerobic respiration in other organisms
Plants and microorganisms can also respire without oxygen
Plant cells respire anaerobically they form ethanol and carbon dioxide
Some microorganisms form lactic acid used in food such as yoghurts
What is anaerobic in yeast cells called
fermentation
Types of metabolic reactions
Conversion of glucose → starch, glycogen, cellulose
1 molecule of glycerol & 3 molecules of fatty acids → lipid molecules
Respiration
Photosynthesis
Breakdown of excess proteins → urea
Role of the Liver
Detoxifying poisonous substances (ethanol)
Passing breakdown products into blood so they can be excreted in urine
Breaking down old cells and storing iron until needed to synthesise more blood cells
Removing lactic acid
Blood flowing through muscles transports lactic acid to liver
It is then converted back into glucose
