B9- Respiration Flashcards
Aerobic respiration word equation
Glucose + oxygen—-> carbon dioxide + water + (energy)
Aerobic respiration symbol equation
C6H12O6 + 6O2—-> 6CO2 + 6H2O
Aerobic respiration
Where does it occur?
What type of reaction?
Mitochondria
Exothermic
4 uses of aerobic respiration in the body…
Breaking down molecules, digestion
Building up molecules, protein synthesis
Regulating body temp
Muscle contraction, heartbeat, moving food
What do muscle fibres need to contract?
Mitochondria to provide energy
How do muscles store glucose and why?
Stored in muscles as glycogen which is insoluble and can be converted rapidly back to glucose during exercise
During exercise the body responds in 3 key ways?
Why?
Converting glycogen back to glucose- more respiration
Increase heart rate, arteries widen, more oxygenated blood to muscles-more O2 supplied, more CO2 removed
Deeper, faster breathing- more O2 to blood, more CO2 removed from blood
All increase glucose and oxygen supplied and increase CO2 removed
Anaerobic respiration word equation (humans)
Glucose—-> lactic acid + (energy)
Oxygen debt
Extra oxygen needed to break down lactic acid into glucose
How does oxygen debt occur? (how it links to panting?)
Lack of oxygen–> anaerobic respiration–> forms lactic acid–> oxygen needed to break it down–> extra oxygen needed–> panting after exercise
Lactic acid repayment equation
Lactic acid + oxygen—-> carbon dioxide + water
Anaerobic respiration word equation (plants or microbes)
Glucose—-> ethanol + carbon dioxide + (energy)
What is anaerobic respiration in yeast called?
Fermentation
Aerobic and anaerobic respiration
Energy production?
Glucose breakdown?
Aerobic- Produces lots of energy, Breaks down glucose fully
Anaerobic- Inefficient energy release, Doesn’t fully break down glucose
Where does anaerobic respiration occur?
Cytoplasm
Metabolism
The sum of all chemical reactions in the body or cell
Examples of chemical reactions in the body
Protein synthesis
Respiration
Conversion of glucose
Conversion of lipids to fatty acids and glycerol
4 key roles of the liver
Detoxify ethanol from alcoholic drinks
Break down old blood cells and store the iron
Remove lactic acid
Pass breakdown products to kidneys to be excreted
2 ways liver removes lactic acid
Convert it to glucose, store excess as glycogen
Binds it with oxygen to form carbon dioxide and water
