B9 - Respiration Flashcards
What is the equation for aerobic respiration?
Glucose + oxygen - carbon dioxide + water
Is aerobic respiration a exo or endothermic reaction?
Exothermic because it transfers energy
What does the number of mitochondria in a cell show?
How active a cell is
What is the site of respiration?
Mitochondria
Why do we need respiration?
For living cells to carry out basic functions
Make muscles contract from energy from respiration
Maintain constant internal body temperature
In PLANTS - Help for active transport of mineral ions from soil
What do muscles store glucose as a carbohydrate in?
Glycogen
What can be rapidly converted using in aerobic respiration to help muscles contract?
Glycogen back into glucose
What are the 3 factors of muscular activity increasing?
Heart rate inc - arteries dilate to supply blood with increased cellular respiration
Breathing rate inc - depth of breathing brining more oxygen for red blood cells to transfer
Glycogen back into glucose - supply’s cells with energy for increased cellular respiration
What is the equation for anaerobic respiration?
Glucose - lactic acid + energy
Why does lactic acid build up?
Breakdown of glucose is incomplete
What does lactic acid result in?
Oxygen debt stopping muscles contracting efficiently
What is oxygen debt?
The amount of oxygen needed to convert lactic acid back to glucose
Give 3 metabolic reactions?
Conversion of glucose to starch, cellulose, glycogen
Formation of lipid molecules
Reactions of respiration
What is the role of the liver?
Detoxifying poisonous substances such as ethanol in alcohol, breaks down old and worn out blood cells
