B9 - Respiration Flashcards
Respiration equation
Glucose + oxygen = CO2 + water
What are the products
CO2 and water
What do organisms need energy for
Chemical reactions for larger molecules.
Movement.
Keeping warm.
Where does respiration occur
In the mitochondria
Is respiration exothermic or endothermic
It is exothermic, the energy is transferred to the environment surrounding it
Why do muscles store glucose as glycogen
So it can be rapidly converted to glucose during exercise
What is the function of glycogen
To supply cells with fuel needed for cellular respiration
Effects of increased exercise
More muscle contraction.
Needs more energy.
Needs more respiration,
Anaerobic respiration
Not as efficient as aerobic respiration. This is because the glucose is not broken down completely so releases far less energy.
Aerobic respiration equation
Glucose = Lactic acid + the energy released
Oxygen debt
The waste lactic acid cant be breathed out like CO2, so when exercise is over the excess lactic acid has to be broken down into carbon dioxide + water (this requires oxygen). The amount of oxygen used to do this is called to oxygen debt, the bigger the debt the longer you are out of breath
Recovery
During recovery, lactic acid is removed from the muscles. As oxygen reacts with this to make CO2 and H2O the remaining energy is lost as heat
What is metabolism
It is the sum of all reactions that take place in the cell or body
